Standard Mathematics Primary 3 Whole Numbers

Look at the number sequence below. The same rule is used to get from one number to the next. 5, 12, 19, 26, ___, 40 What is the missing number?

A 33
B 32
C 34
D 35
Show Worked Solution

Worked Solution

Step 1: Find the common difference between consecutive terms. 12 − 5 = 7. 19 − 12 = 7. 26 − 19 = 7. Step 2: The rule is 'add 7'. Step 3: Apply the rule to 26: 26 + 7 = 33. Step 4: Verify with the next term: 33 + 7 = 40. ✓ Step 5: The missing number is 33. Answer: 33

Correct answer: 33

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