Simplification & Approximation Quiz: Quantitative Aptitude Practice
10 timed simplification and approximation questions for IBPS PO and SBI PO prelims. BODMAS, fractions, percentages, squares and quick estimation.
Simplification & Approximation Quiz: Quantitative Aptitude Practice
Tip: use keys 1-4 to answer, Enter for next.
Answers to the starter quiz
Spoilers! These are the Starter quiz’s answers. Easy, Medium, Hard and Mixed rounds show their own answers when you finish.
Simplify: 48 ÷ 6 × 4 - 3 × (8 - 5)
- -7
- 23
- 29
- 17
Answer: 23. Bracket first: 8 - 5 = 3. Then left to right: 48 ÷ 6 × 4 = 32 and 3 × 3 = 9. So 32 - 9 = 23.
Find the value of 25% of 640 + 3/8 of 512 - 120.
- 222
- 232
- 242
- 212
Answer: 232. 25% of 640 = 160 and 3/8 of 512 = 192. 160 + 192 - 120 = 232.
What approximate value should come in place of ? 39.97% of 600.12 + 14.98 × 7.03 = ?
- 330
- 360
- 375
- 345
Answer: 345. Round: 40% of 600 = 240 and 15 × 7 = 105, so the value is about 345.
What approximate value should come in place of ? square root of 1,023.9 × 4.98 = ?
- 160
- 150
- 170
- 155
Answer: 160. The square root of 1,024 is 32 and 4.98 is about 5, so 32 × 5 = 160.
Find the value of 3/4 of 5/6 of 2/5 of 1,200.
- 250
- 320
- 300
- 360
Answer: 300. Multiply the fractions first: 3/4 × 5/6 × 2/5 = 30/120 = 1/4. One-quarter of 1,200 is 300.
What should come in place of ? ? × 15 = 35% of 900 - 15
- 18
- 22
- 25
- 20
Answer: 20. 35% of 900 = 315, and 315 - 15 = 300. So ? = 300 ÷ 15 = 20.
What is the value of 87² - 13²?
- 7,400
- 7,600
- 7,300
- 7,500
Answer: 7,400. Use a² - b² = (a + b)(a - b): (87 + 13)(87 - 13) = 100 × 74 = 7,400.
What is the value of 999 × 999?
- 997,001
- 999,001
- 998,001
- 998,991
Answer: 998,001. (1,000 - 1)² = 1,000,000 - 2,000 + 1 = 998,001.
What approximate value should come in place of ? 4,999 ÷ 24.98 + 7.99² = ?
- 264
- 254
- 274
- 284
Answer: 264. 5,000 ÷ 25 = 200 and 8² = 64, so the value is about 264.
Simplify: 1.25 × 0.8 + 3.6 ÷ 0.12
- 4
- 13
- 30.1
- 31
Answer: 31. 1.25 × 0.8 = 1. For 3.6 ÷ 0.12 shift both decimals two places: 360 ÷ 12 = 30. Total 31.
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