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Arithmetic Ability
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Q.
Insert the missing number. 16, 33, 65, 131, 261, (....)
A.
523
B.
521
C.
613
D.
721
View Answer
Correct choice:
Explanation:
Each number is twice the preceding one with 1 added or subtracted alternatively. So, the next number is (2 x 261 + 1) = 523.
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