Approximation problems
- 1. 26.823 x 27.923 x 4.5001 =?
Options- A. 3500
- B. 3450
- C. 3100
- D. 3400 Discuss
Correct Answer: 3400
Explanation:
26.823 x 27.923 x 4.5001
? 27 x 28 x 4.5000 = 756 x 4.5000 = 3402 ? 3400
- 2. 3739 + 164 x 27 =?
Options- A. 105400
- B. 4000
- C. 8200
- D. 690 Discuss
Correct Answer: 8200
Explanation:
3739 + 164 x 27 = ?
? = 3739 + 4428 = 8167 ? 8200
- 3. 21 + 3.7 x 2.9 =?
Options- A. 74
- B. 70
- C. 27
- D. 32 Discuss
Correct Answer: 32
Explanation:
21 + 3.7 x 2.9 = ?
? ? 21+ 4 x 3 ? 21 + 12 ? 33 ? 32
- 4. (21 + 99) x (30 - 19.02) =?
Options- A. 3581
- B. 131
- C. 1290
- D. None of these Discuss
Correct Answer: None of these
Explanation:
(21+ 99) x (30 - 19.02)
? (21+ 99 ) x (30 - 19)
? 120 x 11 = 1320
- 5. 198.001 x 25 + 112.05 x 24.998 =?
Options- A. 7570
- B. 7550
- C. 7500
- D. 7750 Discuss
Correct Answer: 7750
Explanation:
? = 198.001 x 25 + 112.05 x 24.998
= 198 x 25 + 112 x 25
= 25(198 + 112)
= 25 x 310 = 7750
- 6. 17.995 x 16.005 +15.999 x 15.001 =?
Options- A. 513
- B. 528
- C. 440
- D. 818 Discuss
Correct Answer: 528
Explanation:
? = 17.995 x 16.005 + 15.999 x 15.001
= 18 x 16 + 16 x 15 = 16 x ( 18 + 15)
= 16 x 33 = 528
- 7. 127.007 x 7.998 + 6.05 x 4.001 =?
Options- A. 1090
- B. 1200
- C. 1120
- D. 1040 Discuss
Correct Answer: 1040
Explanation:
? = 127.007 x 7.998 + 6.05 x 4.001
= 127 x 8 + 6 x 4 = 1016 + 24 = 1040
- 8. 198.995 x 12.005 + 16.25 x 6.95 =?
Options- A. 2580
- B. 2550
- C. 2400
- D. 2500 Discuss
Correct Answer: 2500
Explanation:
? = 198.995 x 12.005 + 16.24 x 6.95
= 199 x 12 +16 x 7 = 2388 + 112 = 2500
- 9. 2375.85 ÷ 18.01 - 4.525 x 8.05?
Options- A. 103
- B. 96
- C. 88
- D. 90 Discuss
Correct Answer: 96
Explanation:
? = 2375.85 ÷ 18.01 - 4.525 x 8.05
= 2376 ÷ 18 - 4.5 x 8 = 132 - 36 = 96
- 10. 2508 ÷ 15.02 +? x 11 = 200
Options- A. 13
- B. 8
- C. 3
- D. 4 Discuss
Correct Answer: 3
Explanation:
2508 ÷ 15.02 ÷ ? x 11 = 200
? 2508/15 + ? x 11 = 200
? ? = (200 - 167.2) x 1/11 = 2.98 ? 3
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