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15 is a whole number.
The whole number that you can multiply by to get 15 is 15.
To determine how many times 15 can go into 133, you would divide 133 by 15. The result is approximately 8.8667. Since we cannot have a fraction of a division, we would round down to the nearest whole number. Therefore, 15 can go into 133 approximately 8 times.
The square root of 15 is not a whole number.
It is because a whole number multiplied by itself does not equal 15. An example of a square number is 49. 7 times 7 equals 49.