1.

The four digit number 8ab9 is a perfect square. The value of a2 + b2 is(A) 52 (B) 62 (C) 54 (D) 68

Answer»

Correct option: (A) 52

Explanation:

932 = 8649

∴ a = 6, b = 4

∴ a2 + b2 = 62 + 42 = 52.



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