QQuestionMathematics
QuestionMathematics
"Which of the following is NOT a factor of 90?
A. 15
B. 5
C. 12
D. 6"
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Answer
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Step 1: To solve this problem, we need to check which of the options are factors of 90.
A factor is a number that divides another number evenly.
Step 2: First, let's find the prime factors of 90.
We can do this by dividing 90 by the smallest prime number, which is 2, and continuing until we get a prime number. 90 ÷ 2 = 45 45 ÷ 3 = 15 15 ÷ 3 = 5 Since 5 is a prime number, we have found the prime factors of 90: 2, 3, 3, 5.
Final Answer
The option that is NOT a factor of 90 is C. 12.
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