Question
[4(1/2) + 4(1/3)] × 12 – 42 =
?2 What will come in place of question mark (?) in the given expression?Solution
[4(1/2) + 4(1/3)] × 12 – 42 = ?2 => [(9/2) + (13/3)] × 12 – 42 = ?2 => [(27 + 26)/6] × 12 – 42 = ?2 => 53/6 × 12 – 42 = ?2  => ?2 = 106 – 42 => ? = √64 => ? = ±8
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