Approximation problems
- 1. 31% of 1508 + 26% of 2018 =?
Options- A. 1500
- B. 2000
- C. 1000
- D. 1200 Discuss
Correct Answer: 1000
Explanation:
? = 31% of 1508 + 26% of 2018
= 1508 x 31 + 20.18 x 26
= 467.48 + 524.68
? 992.16 = 1000
- 2. 85% of 225 + 32.91 x 5.01 =?
Options- A. 375
- B. 340
- C. 355
- D. 345 Discuss
Correct Answer: 355
Explanation:
? = 85% of 225 + 32.91 x 5.01
? 85% of 225 + 33 x 5
= (225 x 85)/100 + 165
= 191.25 + 165 = 356.25 = 355
- 3. (15.96) 2 + 75% of 285 =?
Options- A. 435
- B. 485
- C. 440
- D. 470 Discuss
Correct Answer: 470
Explanation:
? = (15.96)2 + 75 % of 285
? (16)2 + 214 = 256 + 214 = 470
- 4. 0.0005 x 76 x 10 3 +? = 170% of 29.98?
Options- A. 12
- B. 16
- C. 18
- D. 15 Discuss
Correct Answer: 12
Explanation:
0.0005 x 76 x 103 + ? = 170% of 29.98
? 0.038 x 1000 + ? = (30 x 170)/100
? ? = 51- 38 = 13 ? 12
- 5. 39.8% of 400 +?% of 350 = 230
Options- A. 15
- B. 25
- C. 18
- D. 20 Discuss
Correct Answer: 20
Explanation:
39.8% of 400 + ?% of 350 = 230
? 159.2 + (350 x ?)/100 = 230
&Arr; ? = (230 - 159.2) x 100/360 = 20.23 = 20
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