which number is a perfect cube
a.7
b. 25
c. 66<----
d. 27
disagree
27?
Yes.
3^3 = 27
To find out which number is a perfect cube, we need to determine if it can be expressed as the cube of an integer. This means that we need to find a whole number that can be multiplied by itself twice to get the given number.
Let's go through the options:
a. 7: To determine if 7 is a perfect cube, we need to find a whole number that, when multiplied by itself twice, gives us 7. However, there is no whole number that can satisfy this condition. Therefore, 7 is not a perfect cube.
b. 25: Similarly, for 25 to be a perfect cube, we need to find a whole number multiplied by itself twice. In this case, 5 is the whole number that can be multiplied by itself twice to give us 25 (5 * 5 * 5 = 25). Therefore, 25 is a perfect cube.
c. 66: To check if 66 is a perfect cube, we need to find a whole number that, when multiplied by itself twice, equals 66. However, there is no whole number that satisfies this condition. Therefore, 66 is not a perfect cube.
d. 27: For 27 to be a perfect cube, we need to find a whole number multiplied by itself twice. In this case, 3 is the whole number that can be multiplied by itself twice to give us 27 (3 * 3 * 3 = 27). Hence, 27 is a perfect cube.
Therefore, the correct answer is d. 27.