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In the following number series, a wrong number is given. Find out the wrong number.
5.9, 6, 6.1, 6.4, 7.9, 18.5, 112.9
5.9, 6, 6.1, 6.4, 7.9, 18.5, 112.9
- A18.5
- B6.4
- C6.1
- D112.9
Answer not set
Discussion 1
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CCommunity
The pattern of given series is:
⇒ 6 – 5.9 = 0.1 = 0.1
⇒ 6.1 – 6 = 0.1 = 0.1 × 1
⇒ 6.4 – 6.1 = 0.3 = 0.1 × 3
⇒ 7.9 – 6.4 = 1.5 = 0.3 × 5
⇒ 18.4 – 7.9 = 10.5 = 1.5 × 7 (not 18.5)
⇒ 112.9 – 18.4 = 10.5 × 9 = 94.5
∴ Wrong number in series = 18.5
⇒ 6 – 5.9 = 0.1 = 0.1
⇒ 6.1 – 6 = 0.1 = 0.1 × 1
⇒ 6.4 – 6.1 = 0.3 = 0.1 × 3
⇒ 7.9 – 6.4 = 1.5 = 0.3 × 5
⇒ 18.4 – 7.9 = 10.5 = 1.5 × 7 (not 18.5)
⇒ 112.9 – 18.4 = 10.5 × 9 = 94.5
∴ Wrong number in series = 18.5