Which of the following numbers is a multiple of 4 but NOT a factor of 48?
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Worked Solution
Step 1: Check which options are multiples of 4.
12÷4=3 ✓, 16÷4=4 ✓, 20÷4=5 ✓, 24÷4=6 ✓. All four are multiples of 4.
Step 2: Check which are factors of 48.
48÷12=4 ✓ (factor), 48÷16=3 ✓ (factor), 48÷20=2.4 ✗ (not a factor), 48÷24=2 ✓ (factor).
Step 3: 20 is the only option that is a multiple of 4 AND not a factor of 48.
Answer: 20.
Correct answer: 20
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