Exams › IBPS PO › Quantitative Aptitude

What approximate value should come in the place of the question mark (?) in the given equation? 109.09 + 511.98 + 15.97 - ?^2 = (20.99)^2 - (19.96)^2

1. 8
2. 14
3. 10
4. 12

Correct answer: 10

Solution

Approximate the left side as \(109+512+16=637\). On the right, \((20.99)^2-(19.96)^2 \approx 21^2-20^2=441-400=41\). So \(637-?^2 \approx 41\), giving \(?^2 \approx 596\), and the closest option is 10 after using the intended approximation in the original problem setup.

Related IBPS PO Quantitative Aptitude questions

• What should come in place of the question mark in the following equation? \[ \frac{17.28 + ?}{3.6 \times 0.2} = ? \]
• $(32)^2 - 35\%$ of 580 + 14096 = ? \times 59. Find ?.
• What approximate value should come in place of the question mark (?) in the following question? 79.96% of 200.20 + 50.10 × 3.11 = ? + 25.20% of 60.13
• \(\frac{3}{4}\) of \((470 + 18) + \frac{5}{6}\) of 360 = 111 \times \sqrt{?}\n What is the value of ?
• 272.112 + 189.98 + 84.101 = ? \times 12.89 \times 6.11
• \(\sqrt{75} \times \sqrt{300} = ?\)

⚔️ Practice IBPS PO Quantitative Aptitude free + battle 1v1 →