Foundation Mathematics Primary 4 Factors and Multiples

Mei Ling wants to find a common factor of 12 and 18 that is greater than 1. Which of the following is a common factor of both 12 and 18?

A 4
B 5
C 6
D 8
Show Worked Solution

Worked Solution

Step 1: List the factors of 12: 1, 2, 3, 4, 6, 12. Step 2: List the factors of 18: 1, 2, 3, 6, 9, 18. Step 3: Common factors (in both lists): 1, 2, 3, 6. Step 4: From the options, 6 is in both lists. Check: 12 ÷ 6 = 2 ✓ and 18 ÷ 6 = 3 ✓.

Correct answer: 6

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