Question
(?)2 + 4.113 = 23.92
– 28.03 What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)Solution
(?)2 + 43 = 242 – 28 (?)2 + 64 = 576 – 28 (?)2 = 548 – 64 (?)2 = 484 ? = 22
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