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Quantitative Aptitude · Bank exam practice

Approximation questions for bank exams

Approximation asks you to round decimals and roots to the nearest whole number and pick the closest option. It rewards speed over exact working. Plutomonk has 1,040 Approximation questions in Prelims and Mains sets of 10, each with a worked solution. They are useful for IBPS PO, SBI PO, IBPS Clerk, SBI Clerk, IBPS RRB and RBI Assistant.

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Quick tip

Round each term before you calculate, and check how far apart the options are. Wide gaps mean you can round more boldly.

Approximation sample questions with answers

These are from the first Prelims and Mains sets. Try each question before you open the solution.

Q1. 39.96% of 359.7 + 66.01 × 12.97 ≈ ?

  1. 1453
  2. 1152
  3. 1002
  4. 701
  5. 852
Show answer and solution

Answer: C. 1002

Round: 40% of 360 = 144; 66 × 13 = 858. ≈ 1002.

Q2. 25.01% of 700.2 + 89.01 × 5.03 ≈ ?

  1. 620
  2. 527
  3. 899
  4. 713
  5. 434
Show answer and solution

Answer: A. 620

Round: 25% of 700 = 175; 89 × 5 = 445. ≈ 620.

Q3. 39.96% of 740.1 + 64.02 × 4.97 ≈ ?

  1. 431
  2. 708
  3. 616
  4. 801
  5. 524
Show answer and solution

Answer: C. 616

Round: 40% of 740 = 296; 64 × 5 = 320. ≈ 616.

Q4. 10.04% of 840.4 + 22.03 × 10.05 ≈ ?

  1. 213
  2. 258
  3. 395
  4. 441
  5. 304
Show answer and solution

Answer: E. 304

Round: 10% of 840 = 84; 22 × 10 = 220. ≈ 304.

Q5. 10.02% of 640.5 + 31.97 × 13.04 ≈ ?

  1. 336
  2. 408
  3. 552
  4. 480
  5. 696
Show answer and solution

Answer: D. 480

Round: 10% of 640 = 64; 32 × 13 = 416. ≈ 480.

Q6. 20.05% of 900.1 + 67.05 × 7.04 ≈ ?

  1. 746
  2. 649
  3. 454
  4. 941
  5. 552
Show answer and solution

Answer: B. 649

Round: 20% of 900 = 180; 67 × 7 = 469. ≈ 649.

Q7. 40.03% of 659.7 + 29.97 × 7.02 ≈ ?

  1. 545
  2. 616
  3. 403
  4. 687
  5. 474
Show answer and solution

Answer: E. 474

Round: 40% of 660 = 264; 30 × 7 = 210. ≈ 474.

Q8. 10.05% of 199.6 + 96.05 × 7.05 ≈ ?

  1. 900
  2. 484
  3. 692
  4. 1003
  5. 796
Show answer and solution

Answer: C. 692

Round: 10% of 200 = 20; 96 × 7 = 672. ≈ 692.

Q9. √729.4 × 27.04 + 34.98% of 679.8 − 799.8 ÷ 4.98 ≈ ?

  1. 605
  2. 1130
  3. 807
  4. 904
  5. 1009
Show answer and solution

Answer: C. 807

√729 ≈ 27; 27 × 27 = 729; 35% of 680 = 238; 800 ÷ 5 = 160. 729 + 238 − 160 ≈ 807.

Q10. √441.2 × 20.96 + 34.97% of 260.5 − 2771.8 ÷ 6.96 ≈ ?

  1. 170
  2. 102
  3. 136
  4. 120
  5. 190
Show answer and solution

Answer: C. 136

√441 ≈ 21; 21 × 21 = 441; 35% of 260 = 91; 2772 ÷ 7 = 396. 441 + 91 − 396 ≈ 136.

Q11. √729.2 × 26.98 + 44.98% of 520.2 − 504.3 ÷ 4.04 ≈ ?

  1. 1172
  2. 837
  3. 628
  4. 737
  5. 1046
Show answer and solution

Answer: B. 837

√729 ≈ 27; 27 × 27 = 729; 45% of 520 = 234; 504 ÷ 4 = 126. 729 + 234 − 126 ≈ 837.

Q12. √901 × 30.02 + 64.96% of 399.7 − 672.3 ÷ 8.02 ≈ ?

  1. 1205
  2. 947
  3. 1506
  4. 1345
  5. 1076
Show answer and solution

Answer: E. 1076

√900 ≈ 30; 30 × 30 = 900; 65% of 400 = 260; 672 ÷ 8 = 84. 900 + 260 − 84 ≈ 1076.

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