1.

If (46)2 is subtracted from the square of a number, the answer so obtained is 485. What is the number ? (a) 4 (b) 51 (c) 56 (d) 53 (e) None of these

Answer»

(b) Let the number be x
x2 – (46)2 = 485
x2 = 485 + (46)2 = 2601
x = 2601 = 51



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