In each series, look for the degree and direction of change between the…
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In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much
Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
- A.
7
- B.
10
- C.
14
- D.
15
Attempted by 142 students.
Show answer & explanation
Correct answer: D
Answer: 15
Explanation:
The sequence follows an alternating pattern: add 1, then add 3, then add 1, then add 3, and so on.
Calculate step by step: 3 → 4 (+1), 4 → 7 (+3), 7 → 8 (+1), 8 → 11 (+3), 11 → 12 (+1).
After 12, the next operation is +3, so 12 + 3 = 15, which is the next number.