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Rational & Irrational Numbers
Distinguishing rational/irrational
96
Mathematics
Not Applicable
05/30/2005

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Term
(T/F): The square root of 80 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 80, the square root of 80 is irrational.
Term
(T/F): The square root of 22 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 22, the square root of 22 is irrational.
Term
(T/F): The square root of 3 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 3, the square root of 3 is irrational.
Term
(T/F): The square root of 25 is a rational number.
Definition
True. EXPLANATION: The square root of 25 is 5, which is an integer, and therefore rational.
Term
(T/F): The square root of 9 is a rational number.
Definition
True. EXPLANATION: The square root of 9 is 3, which is an integer, and therefore rational.
Term
(T/F): The square root of 100 is a rational number.
Definition
True. EXPLANATION: The square root of 100 is 10, which is an integer, and therefore rational.
Term
(T/F): The square root of 5 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 5, the square root of 5 is irrational.
Term
(T/F): The square root of 99 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 99, the square root of 99 is irrational.
Term
(T/F): The square root of 5 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 5, the square root of 5 is irrational.
Term
(T/F): The square root of 36 is an irrational number.
Definition
False. EXPLANATION: The square root of 36 is 6, which is an integer, and therefore rational.
Term
(T/F): The square root of 49 is an irrational number.
Definition
False. EXPLANATION: The square root of 49 is 7, which is an integer, and therefore rational.
Term
(T/F): The square root of 16 is an irrational number.
Definition
False. EXPLANATION: The square root of 16 is 4, which is an integer, and therefore rational.
Term
(T/F): The number 85.6060606060. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 60 repeats forever, so the number is rational.
Term
(T/F): The number 25.232232232232232. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 232 repeats forever, so the number is rational.
Term
(T/F): The number 8.99999. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 9 repeats forever, so the number is rational.
Term
(T/F): The number 21.167167167167167. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 167 repeats forever, so the number is rational.
Term
(T/F): The number 23.290290290290290. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 290 repeats forever, so the number is rational.
Term
(T/F): The number 16.211211211211211. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 211 repeats forever, so the number is rational.
Term
(T/F): The number 12.67677677767777. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 7's after each 6 keeps growing, so the number is irrational.
Term
(T/F): The number 32.23233233323333. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 3's after each 2 keeps growing, so the number is irrational.
Term
(T/F): The number 4.49499499949999. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 9's after each 4 keeps growing, so the number is irrational.
Term
(T/F): The number 65.34344344434444. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 4's after each 3 keeps growing, so the number is irrational.
Term
(T/F): The number 16.62622622262222. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 2's after each 6 keeps growing, so the number is irrational.
Term
(T/F): The number 90.20200200020000. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 0's after each 2 keeps growing, so the number is irrational.
Term
(T/F): The square root of 57 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 57, the square root of 57 is irrational.
Term
(T/F): The square root of 45 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 45, the square root of 45 is irrational.
Term
(T/F): The square root of 63 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 63, the square root of 63 is irrational.
Term
(T/F): The square root of 16 is a rational number.
Definition
True. EXPLANATION: The square root of 16 is 4, which is an integer, and therefore rational.
Term
(T/F): The square root of 25 is a rational number.
Definition
True. EXPLANATION: The square root of 25 is 5, which is an integer, and therefore rational.
Term
(T/F): The square root of 81 is a rational number.
Definition
True. EXPLANATION: The square root of 81 is 9, which is an integer, and therefore rational.
Term
(T/F): The square root of 57 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 57, the square root of 57 is irrational.
Term
(T/F): The square root of 80 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 80, the square root of 80 is irrational.
Term
(T/F): The square root of 3 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 3, the square root of 3 is irrational.
Term
(T/F): The square root of 25 is an irrational number.
Definition
False. EXPLANATION: The square root of 25 is 5, which is an integer, and therefore rational.
Term
(T/F): The square root of 25 is an irrational number.
Definition
False. EXPLANATION: The square root of 25 is 5, which is an integer, and therefore rational.
Term
(T/F): The square root of 49 is an irrational number.
Definition
False. EXPLANATION: The square root of 49 is 7, which is an integer, and therefore rational.
Term
(T/F): The number 17.7171717171. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 71 repeats forever, so the number is rational.
Term
(T/F): The number 37.273273273273273. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 273 repeats forever, so the number is rational.
Term
(T/F): The number 96.280280280280280. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 280 repeats forever, so the number is rational.
Term
(T/F): The number 4.296296296296296. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 296 repeats forever, so the number is rational.
Term
(T/F): The number 80.111111111111111. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 111 repeats forever, so the number is rational.
Term
(T/F): The number 28.145145145145145. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 145 repeats forever, so the number is rational.
Term
(T/F): The number 36.38388388838888. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 8's after each 3 keeps growing, so the number is irrational.
Term
(T/F): The number 9.50500500050000. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 0's after each 5 keeps growing, so the number is irrational.
Term
(T/F): The number 32.91911911191111. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 1's after each 9 keeps growing, so the number is irrational.
Term
(T/F): The number 26.20200200020000. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 0's after each 2 keeps growing, so the number is irrational.
Term
(T/F): The number 7.58588588858888. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 8's after each 5 keeps growing, so the number is irrational.
Term
(T/F): The number 51.92922922292222. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 2's after each 9 keeps growing, so the number is irrational.
Term
(T/F): The square root of 5 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 5, the square root of 5 is irrational.
Term
(T/F): The square root of 57 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 57, the square root of 57 is irrational.
Term
(T/F): The square root of 63 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 63, the square root of 63 is irrational.
Term
(T/F): The square root of 81 is a rational number.
Definition
True. EXPLANATION: The square root of 81 is 9, which is an integer, and therefore rational.
Term
(T/F): The square root of 64 is a rational number.
Definition
True. EXPLANATION: The square root of 64 is 8, which is an integer, and therefore rational.
Term
(T/F): The square root of 9 is a rational number.
Definition
True. EXPLANATION: The square root of 9 is 3, which is an integer, and therefore rational.
Term
(T/F): The square root of 22 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 22, the square root of 22 is irrational.
Term
(T/F): The square root of 57 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 57, the square root of 57 is irrational.
Term
(T/F): The square root of 3 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 3, the square root of 3 is irrational.
Term
(T/F): The square root of 9 is an irrational number.
Definition
False. EXPLANATION: The square root of 9 is 3, which is an integer, and therefore rational.
Term
(T/F): The square root of 81 is an irrational number.
Definition
False. EXPLANATION: The square root of 81 is 9, which is an integer, and therefore rational.
Term
(T/F): The square root of 36 is an irrational number.
Definition
False. EXPLANATION: The square root of 36 is 6, which is an integer, and therefore rational.
Term
(T/F): The number 39.242242242242242. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 242 repeats forever, so the number is rational.
Term
(T/F): The number 35.247247247247247. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 247 repeats forever, so the number is rational.
Term
(T/F): The number 94.5454545454. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 54 repeats forever, so the number is rational.
Term
(T/F): The number 91.3333333333. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 33 repeats forever, so the number is rational.
Term
(T/F): The number 76.278278278278278. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 278 repeats forever, so the number is rational.
Term
(T/F): The number 91.7474747474. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 74 repeats forever, so the number is rational.
Term
(T/F): The number 57.82822822282222. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 2's after each 8 keeps growing, so the number is irrational.
Term
(T/F): The number 21.97977977797777. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 7's after each 9 keeps growing, so the number is irrational.
Term
(T/F): The number 21.04044044404444. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 4's after each 0 keeps growing, so the number is irrational.
Term
(T/F): The number 92.28288288828888. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 8's after each 2 keeps growing, so the number is irrational.
Term
(T/F): The number 4.71711711171111. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 1's after each 7 keeps growing, so the number is irrational.
Term
(T/F): The number 20.54544544454444. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 4's after each 5 keeps growing, so the number is irrational.
Term
(T/F): The square root of 22 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 22, the square root of 22 is irrational.
Term
(T/F): The square root of 22 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 22, the square root of 22 is irrational.
Term
(T/F): The square root of 57 is a rational number.
Definition
False. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 57, the square root of 57 is irrational.
Term
(T/F): The square root of 81 is a rational number.
Definition
True. EXPLANATION: The square root of 81 is 9, which is an integer, and therefore rational.
Term
(T/F): The square root of 16 is a rational number.
Definition
True. EXPLANATION: The square root of 16 is 4, which is an integer, and therefore rational.
Term
(T/F): The square root of 64 is a rational number.
Definition
True. EXPLANATION: The square root of 64 is 8, which is an integer, and therefore rational.
Term
(T/F): The square root of 5 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 5, the square root of 5 is irrational.
Term
(T/F): The square root of 3 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 3, the square root of 3 is irrational.
Term
(T/F): The square root of 99 is an irrational number.
Definition
True. EXPLANATION: Only perfect squares have rational square roots. Since there is no integer that can be multiplied by itself to make 99, the square root of 99 is irrational.
Term
(T/F): The square root of 81 is an irrational number.
Definition
False. EXPLANATION: The square root of 81 is 9, which is an integer, and therefore rational.
Term
(T/F): The square root of 9 is an irrational number.
Definition
False. EXPLANATION: The square root of 9 is 3, which is an integer, and therefore rational.
Term
(T/F): The square root of 64 is an irrational number.
Definition
False. EXPLANATION: The square root of 64 is 8, which is an integer, and therefore rational.
Term
(T/F): The number 10.105105105105105. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 105 repeats forever, so the number is rational.
Term
(T/F): The number 64.132132132132132. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 132 repeats forever, so the number is rational.
Term
(T/F): The number 99.233233233233233. . . is rational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 233 repeats forever, so the number is rational.
Term
(T/F): The number 46.6969696969. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 69 repeats forever, so the number is rational.
Term
(T/F): The number 76.6969696969. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 69 repeats forever, so the number is rational.
Term
(T/F): The number 66.185185185185185. . . is irrational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. In this case, the number 185 repeats forever, so the number is rational.
Term
(T/F): The number 77.51511511151111. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 1's after each 5 keeps growing, so the number is irrational.
Term
(T/F): The number 90.06066066606666. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 6's after each 0 keeps growing, so the number is irrational.
Term
(T/F): The number 33.23233233323333. . . is irrational.
Definition
True. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 3's after each 2 keeps growing, so the number is irrational.
Term
(T/F): The number 40.61611611161111. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 1's after each 6 keeps growing, so the number is irrational.
Term
(T/F): The number 68.01011011101111. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 1's after each 0 keeps growing, so the number is irrational.
Term
(T/F): The number 18.82822822282222. . . is rational.
Definition
False. EXPLANATION: A rational number has one or more digits to the right of the decimal point that repeat forever. Here, the number of 2's after each 8 keeps growing, so the number is irrational.
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