31
Find the wrong term in the following number series?
1, 4, 8, 16, 31, 64, 127, 256
1, 4, 8, 16, 31, 64, 127, 256
- A31
- B16
- C8
- D6
Answer not set
Discussion 1
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CCommunity
The pattern of the given number series is as:
→ 1,
→ 1 × 2 + 2 = 4,
→ 4 × 2 – 1 = 7, (instead of 8)
→ 7 × 2 + 2 = 16,
→ 16 × 2 – 1 = 31,
→ 31 × 2 + 2 = 64,
→ 64 × 2 – 1 = 127,
→ 127 × 2 + 2 = 256,
Hence, the wrong term of the given number series is 8. The correct term is 7.
→ 1,
→ 1 × 2 + 2 = 4,
→ 4 × 2 – 1 = 7, (instead of 8)
→ 7 × 2 + 2 = 16,
→ 16 × 2 – 1 = 31,
→ 31 × 2 + 2 = 64,
→ 64 × 2 – 1 = 127,
→ 127 × 2 + 2 = 256,
Hence, the wrong term of the given number series is 8. The correct term is 7.