Foundation Mathematics Primary 2 Whole Numbers

What is the missing number in this pattern? 4, 8, 12, __, 20.

A 16
B 14
C 18
D 15
Show Worked Solution

Worked Solution

Step 1: Find the rule. 8 − 4 = 4; 12 − 8 = 4. The pattern adds 4 each time. Step 2: Missing number = 12 + 4 = 16. Step 3: Check: 16 + 4 = 20 ✓. Answer: 16

Correct answer: 16

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