397 × 397 + 104 × 104 + 2 × 397 × 104 = ?
A. 250001
B. 251001
C. 260101
D. 261001
Answer: Option B
Solution(By Examveda Team)
Given expression,= (397)2 + (104)2 + 2 × 397 × 104
= (397 + 104)2
= (501)2
= (500 + 1)2
= (500)2 + 12 + 2 × 500 × 1
= 250000 + 1 + 1000
= 251001
Related Questions on Number System
Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
A. 12, 24, 36
B. 11, 22, 33
C. 12, 24, 32
D. 5, 10, 15
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