Exams › IBPS PO › Quantitative Aptitude

What approximate value will come in place of the question mark (?) in the following equation? 31.1 - 10.1 = ?² - 99.8

1. 24
2. 22
3. 11
4. 12

Correct answer: 11

Solution

The left side is 31.1 - 10.1 = 21. So ?² - 99.8 = 21, giving ?² = 120.8, and the nearest option is 11 because 11² = 121.

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