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Question

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