QQuestionMathematics
QuestionMathematics
"Which of the following is NOT a factor of 90?
A. 15
B. 5
C. 12
D. 6"
12 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
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.
Step 3:: Now, let's check each option to see if it is a factor of 90.
A. 15: We know that 15 is a prime factor of 90, so it is a factor. B. 5: We know that 5 is a prime factor of 90, so it is a factor. C. 12: We can find if 12 is a factor by dividing 90 by 12: 90 ÷ 12 = 7.5. Since 7.5 is not a whole number, 12 is not a factor of 90. D. 6: We can find if 6 is a factor by dividing 90 by 6: 90 ÷ 6 = 15. Since 15 is a whole number, 6 is a factor of 90.
Step 4:: Comparing the options, we find that option C, 12, is not a factor of 90.
Final Answer
The option that is NOT a factor of 90 is C. 12.
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students