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DIRECTIONS for the question: In the following series, one of the terms given is wrong. Find that term and mark that as your answer.

43, 45, 55, 85, 153, 290, 505


1. 55
2. 45
3. 153
4. 85
5. 290

1 Answer

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Best answer
Correct Answer - Option 5 : 290

Calculation:

⇒ 43

⇒ 43 + 13 + 1 = 45

⇒ 45 + 23 + 2 = 55

⇒ 55 + 33 + 3 = 85

⇒ 85 + 43 + 4 = 153

⇒ 153 + 53 + 5 = 283

283 + 63 + 6 = 505

∴ The wrong number in the series is 290.

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