Workkeys Math Practice Test 2025 - Free Math Practice Questions and Study Guide

Question: 1 / 400

Which of the following is NOT a factor of 12?

2

4

5

To determine which number is not a factor of 12, we need to understand what a factor is. A factor is a number that divides another number without leaving a remainder.

For the number 12, we can identify its factors by checking which numbers can equally divide it:

- The number 2 is a factor of 12 because \(12 \div 2 = 6\), which is a whole number.

- The number 4 is also a factor because \(12 \div 4 = 3\), resulting in a whole number.

- The number 3 is a factor since \(12 \div 3 = 4\), also giving a whole number.

However, when we look at the number 5, we find that \(12 \div 5 = 2.4\), which is not a whole number. This means that 5 does not divide into 12 evenly, confirming that it is not a factor of 12. Thus, when identifying the number that does not fit the criteria of being a factor of 12, 5 stands out clearly as the correct choice.

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