Approximation problems
- 1. 421 x 0.9 +130 x 101 + 10000 =?
Options- A. 33500
- B. 23500
- C. 225000
- D. 24500 Discuss
Correct Answer: 23500
Explanation:
? = 421 x 0.9 +130 x 101 x 10000
= 378.9 + 13130 +10000
= 23508.9 ? 23500
- 2. 30.9 x 3000 - 10.1 x 1100 + 8298- 4302 =?
Options- A. 80000
- B. 90000
- C. 105000
- D. 85000 Discuss
Correct Answer: 85000
Explanation:
? = 30.9 x 3000 -10.1 x 1100 + 8298 - 4302
= 92700 - 11110 + 8298 - 4302
= 92700 - 11110 + 8298 - 4302
= 85586 ? 85000
- 3. 56.001 x? - 1000.999 = 231
Options- A. 22
- B. 45
- C. 37
- D. 16 Discuss
Correct Answer: 22
Explanation:
56.001 x ? - 1000.999 = 231
? 56 x ? - 1001 = 231
? 56 x ? = 231 +1001 = 1232/56 = 22
- 4. 1010 ÷ 36+187 x 20.05 =?
Options- A. 3650
- B. 3770
- C. 3825
- D. 3800 Discuss
Correct Answer: 3770
Explanation:
b ? = 1010 ÷ 36 + 187 x 20.05
= 28.0555 + 3749.35 = 3777.40 ? 3770
- 5. 724 ÷ 25 x 31.05 + 101 =?
Options- A. 900
- B. 1000
- C. 950
- D. 1050 Discuss
Correct Answer: 1000
Explanation:
724 ÷ 25 x 31.05 + 101 = ?
? ? = 725 ÷ 25 x 31 + 101
= 29 x 31+ 101
= 899 + 101 = 1000
- 6. 6.39 x 128.948 + 5.215 ÷ 12.189 + 25.056 =?
Options- A. 800
- B. 900
- C. 850
- D. 950 Discuss
Correct Answer: 850
Explanation:
? = 6.39 x 128.948 + 5.215 ÷ 12.189 + 25.056
= 639 x 128.948 + 5.215 x (1/12.189) + 25.056
= 823.97772 + 0.427844778 + 25.056
= 849.4615648 ? 852
- 7. 1559.999 ÷ 24.001 + 11.005 x 6.999 =?
Options- A. 137
- B. 132
- C. 152
- D. 142 Discuss
Correct Answer: 142
Explanation:
1559.999 ÷ 24.001 + 11.005 x 6.999 = ?
? ? ? 1560 ÷ 24 + 11 x 7
= 65 + 77 = 142
- 8. 3.2 x 8.1 + 3185 ÷ 4.95 =?
Options- A. 670
- B. 660
- C. 645
- D. 690 Discuss
Correct Answer: 670
Explanation:
? = 3.2 x 8.1 + 3185 ÷ 4.95
= 25.92 + 643.43 = 669.35 = 670
- 9. 1205 ÷ 2.5 =?
Options- A. 3000
- B. 4800
- C. 300
- D. 480 Discuss
Correct Answer: 480
Explanation:
1205 ÷ 2.5 = 482 ? 480
- 10. 22020 ÷ 0.011=?
Options- A. 20020
- B. 2000000
- C. 200200
- D. 200002 Discuss
Correct Answer: 2000000
Explanation:
22020 ÷ 0.011 = 2001818.181 ? 2000000
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