Question

What approximate value should come in place of question mark (?) in the following questions? (You need not to calcualte the exact value)

(23.99)2– (17.99)2+ (1378.98 + 44.99) ÷ ? = 608

A 6 Correct Answer Incorrect Answer
B 12 Correct Answer Incorrect Answer
C 8 Correct Answer Incorrect Answer
D 3 Correct Answer Incorrect Answer
E 4 Correct Answer Incorrect Answer

Solution

(23.99)2– (17.99)2+ (1378.98 + 44.99) ÷ ? = 608 => (24)2 – (18)2+ (1379 + 45) ÷ ? = 608 => 576 - 324 + 1424 ÷ ? = 608 => 1424 ÷ ? = 356 => ? = 1424/356 => ? = 4

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