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If "number" is only whole numbers then: 17

If "number" can include fractions, then 1/68

Prime factorising 68 gives:

68 = 22 x 17

For a number to be a square number, all the powers of the primes in the prime factorisation of a number must be even.

68 has two primes:

- 2 is to the power 2, so already has an even power
- 17 is to the power 1, so needs to be multiplied by 17 to make it even.

Thus 68 needs to be multiplied by 17 to give 1156 (= 22 x 172) which is 34 (= 2 x 17) squared.

If "number" is not limited to "whole numbers", then 68 x 1/68 = 1 = 12

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Q: What is the smallest number by which you can multiply 68 so that the answer is a square number?

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square-root of 68 times square-root of 68 = 68 (square-root of any number) squared is that number

No

2

68 is a composite number because it has more than two factors and it is not a prime or a square number

68 equals 68. You can't even do multiplication with ituntil you have another number to multiply it with.

A prime number is one that only has factors of 1 and its self (3 is a prime number because you can only multiply 1 and 3 to get it). Since you can multiply 1 and 68, 2 and 34 or 4 and 17 to get 68 it is not a prime number.

In the number 68.

1

Crux, a.k.a The Southern Cross, is the smallest constellation in the night sky. It occupies an area of only 68 square degrees.

To find 120 percent of a number, multiply the number by 1.2. In this instance, 1.2 x 68 = 81.6. Therefore, 120 percent of 68 is equal to 81.6.

To find 21 percent of a number, multiply the number by 0.21. In this instance, 0.21 x 68 = 14.28. Therefore, 21 percent of 68 is equal to 14.28.

To find 140 percent of a number, multiply the number by 1.4. In this instance, 1.4 x 68 = 95.2. Therefore, 140 percent of 68 is equal to 95.2.

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