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Sequence

In each of th...

Question

In each of the following questions , one term is wrong. Find out the wrong term.
11, 21, 43, 85, 171, 343

A

21

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B

85

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C

171

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D

343

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Solution

The correct option is D 343
Double the number and then add and subtract one alternatively. $∴ 171 \times 2 - 1 = 341$ .Thus 343 is the odd man out

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