Direction: In the 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: 14, 28, 20, 40,…
Question and options
Direction: In the 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: 14, 28, 20, 40, 32, 64, _____ What number should come next?
- 52
- 56
- 96
- 128
Answer and explanation
Correct answer: B - 56
The series alternates two steps: multiply by 2, then subtract 8. So 14 × 2 = 28, 28 − 8 = 20, 20 × 2 = 40, 40 − 8 = 32 and 32 × 2 = 64, and the next step gives 64 − 8 = 56. 128 would need the doubling step twice in a row, and 52 or 96 fit neither step.
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CUSAT CAT Five-Year LL.B.
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