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Question

Find the sum of (1+112+122)+(1+122+132)+.........+(1+120072+120082) (CAT 2008)

A
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B
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C
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D
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E
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Solution

The correct option is A

(1+112+122)=(94)12=32=212.

(1+112+122)+(1+122+132)=32+76=83313

Thus, on similar lines,

(1+112+122)+......(1+120072+120082)=2008(12008)


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