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[WpProQuiz 7579]Click Here to View Quantitative Aptitude Video Solution
Simplifications/Approximations
Directions (1 – 10): What exact/approximate value should come in the place of question mark in the given questions?
1) 1/2 + 3 – 4 * 5 + [6 – 7 * 8/4]
a) -32.5
b) -41.5
c) -24.5
d) -18.5
e) -20.5
2) √728.4601* 4.99 -370 + [16.01 * √625.01]
a) 155
b) 165
c) 135
d) 115
e) 125
3) [(6*7 – 3+2 * 8) + 9/3] * 5 – 1 + 7
a) 192
b) 286
c) 196
d) 296
e) 324
4) [(9.99)2 * (√288.96)] – [14 – 6 * 7 + (√168.59) + (11.02)2]
a) 1594
b) 1624
c) 1748
d) 1194
e) 1064
5) [√{3√(7.99) + 6.96} – 3.89 * ( 6.99 + √( 225.1) * 5.96 ) + 13]
a) -226
b) -184
c) -196
d) -288
e) -372
6) 22% of 168 – 19% of 320 + 24% of 460 – 13% of 110
a) 70.25
b) 84.14
c) 72.26
d) 88.51
e) 76.25
7) 128.01x + √1681 = 11.993 + 168.99
a) 12.5
b) 14.5
c) 16.5
d) 22.5
e) 24.5
8) x3 – 149.996 * 1.5 = (5.01)2 * 8.99 + 177.2% of (9.99)3
a) 19
b) 25
c) 29
d) 31
e) 13
9) x% of 160 = √[(√675.989) + 110% of 111 + 20.9% of 99.998]
a) 4.75
b) 1.25
c) 8.125
d) 3.65
e) 6.67
10) 2x = [(32.001 * 5.052)/4.01] * [10.24 % of √2499]
a) 12
b) 10
c) 15
d) 16
e) 20
Answers:
Directions (1-10):
1) Answer: c)
= 1/2 + 3 – 4 * 5 + [6 – 7 * 2]
= 1/2 + 3 – 4 * 5 + [6 – 14]
= 1/2 + 3 – 4 * 5 – 8
= 0.5 + 3 – 4 * 5 – 8
= 0.5 + 3 – 20 – 8
= 3.5 – 20 – 8
= -24.5
2) Answer: b)
= √728.4601* 4.99 -370 + [16.01 * √625.01]
= 27 * 5 – 370 + [16 * 25]
= 27 * 5 – 370 + 400
= 135 – 370 + 400
= 535 – 370
= 165
3) Answer: d)
= [(6*7 – 3+2 * 8) + 9/3] * 5 – 1 + 7
= [(42 – 3 + 16) + 3] * 5 – 1 + 7
= [55 + 3] * 5 – 1 + 7
= 58 * 5 – 1 + 7
= 290 – 1 + 7
= 296
4) Answer: a)
= [(9.99)2 * (√288.96)] – [14 – 6 * 7 + (√168.59) + (11.02)2]
= [100 * 17] – [14 – 42 + (13 + 121)]
= 1700 – [14 – 42 + 134]
= 1700 – 106
= 1594
5) Answer: e)
= [√{3√(7.99) + 6.96} – 3.89 * (6.99 + √(225.1) * 5.96) + 13]
= [√8.96 – 3.89 * (7 + 15 * 6) + 13]
= [3 – 4 * 97 + 13]
= [3 – 388 + 13]
= -372
6) Answer: c)
= [20%+2%] of 168 – [ 20%-1%] of 320+ [ 20% + 2% + 2%] of 460 – [ 11% + 1% +1%] of 110
= [33.6 + 3.36] – [64 – 3.2] + [92 + 9.2 + 9.2] – [12.1 + 1.1 + 1.1]
= 36.96 – 60.8 + 110.4 – 14.30
= 147.36 – 75.1
= 72.26
7) Answer: b)
128.01x + √1681 = 11.993 + 168.99
128x + 41 = 123 + 169
128x = 1728 + 169- 41
128x = 1856
x=14.5
8) Answer: e)
x3 – 149.996 * 1.5 = (5.01)2 * 8.99 + 177.2% of (9.99)3
x3– 150 * 1.5 = 25 * 8 + 177.2% of 1000
x3– 225 = 200 + 1772
x3 = 1972 + 225= 2197
x= 13
9) Answer: c)
x% of 160 = √[ 26 + 110% of 111 + 20% of 100 ]
x% of 160 = √[ 26 + 122 + 21]
x% of 160 = √169
x=(13/160)*100 = 8.125%
10) Answer: b)
2x = [32 * 25/4] * [10.24% of 50]
= 200 * 10.24 * 50/100
= 1024
x = 10
