Numbers - Arithmetic Aptitude Questions and Answers

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397 x 397 + 104 x 104 + 2 x 397 x 104 = ?

250001

251001

260101

261001

Answer : Option B

Explanation :

Given Exp. = (397)2 + (104)2 + 2 x 397 x 104
= (397 + 104)2
= (501)2 = (500 + 1)2
= (5002) + (1)2 + (2 x 500 x 1)
= 250000 + 1 + 1000
= 251001

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