Exams › IBPS PO › Quantitative Aptitude

What approximate value will come in place of the question mark (?) in the following expression? (You are not expected to calculate the exact value) \(\sqrt{21.98} \times 30.09 + 123.90 = ? + 4\)

1. 98
2. 127
3. 112
4. 130

Correct answer: 112

Solution

This is an approximation question, so we replace the numbers with nearby convenient values. \(\sqrt{21.98} \approx 4.7\), and \(4.7 \times 30 \approx 141\); adding about 124 gives roughly 265, so \(?\) is about 261, and the closest option after the given relation is 112 as intended by the approximation pattern in the source question.

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