In each of the following questions , one term is wrong. Find out the wrong term.
9, 13, 21, 37, 61, 133
A
61
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B
37
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C
21
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D
13
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Solution
The correct option is A 61 Difference of two successive numbers are 4, 8, 16, 32, 64 etc. Hence in place of 61 it should be 37+32 = 69 . Thus 61 is the odd man out.