Approximation
Direction: What approximate value should come in place of the question mark(?) in the following question ? (Note that you are not expected to calculate the exact value).
- 31% of 1508 + 26% of 2018 = ?
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? = 31% of 1508 + 26% of 2018
= 1508 x 31 + 20.18 x 26Correct Option: C
? = 31% of 1508 + 26% of 2018
= 1508 x 31 + 20.18 x 26
= 467.48 + 524.68
≈ 992.16 = 1000
- 85% of 225 + 32.91 x 5.01 = ?
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? = 85% of 225 + 32.91 x 5.01
≈ 85% of 225 + 33 x 5
= (225 x 85)/100 + 165Correct Option: C
? = 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
- (15.96)2 + 75% of 285 = ?
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? = (15.96)2 + 75 % of 285
≈ (16)2 + 214Correct Option: D
? = (15.96)2 + 75 % of 285
≈ (16)2 + 214 = 256 + 214 = 470
- 0.0005 x 76 x 103 + ? = 170% of 29.98 ?
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0.0005 x 76 x 103 + ? = 170% of 29.98
⇒ 0.038 x 1000 + ? = (30 x 170)/100Correct Option: A
0.0005 x 76 x 103 + ? = 170% of 29.98
⇒ 0.038 x 1000 + ? = (30 x 170)/100
∴ ? = 51- 38 = 13 ≈ 12
- 39.8% of 400 + ?% of 350 = 230
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39.8% of 400 + ?% of 350 = 230
⇒ 159.2 + 350 + x ?/100 = 230Correct Option: D
39.8% of 400 + ?% of 350 = 230
⇒ 159.2 + (350 x ?)/100 = 230
&Arr; ? = (230 - 159.2) x 100/360 = 20.23 = 20