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Adding Triangular Numbers

In each of th...

Question

In each of the following questions , one term is wrong. Find out the wrong term.
25, 49, 121, 289, 529, 1225

A

129

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B

289

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C

529

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D

1225

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Solution

The correct option is C 529
All the numbers are square on 5, 7, 11, 17, 25, 35. Thus 625 is the right number in place of 529. Thus 529 is odd man out.

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Adding Triangular Numbers

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