# Mixed Quantitative Aptitude Questions Set 130

1. Work done by A in one day is four times the work done by B in one day, while the work done by B in one day is one-third of the work done by C in one day. C alone can complete the work in 16 days. In how many days can all the three together complete the work?
4 days
7 days
9 days
6 days
8 days
Option D
C = 16 days
B = 3*16 = 48 days
A = 48/4 = 12 days
All of them = 1/[1/16+1/48+1/12] = 6 days

2. Three numbers are A,B and C are in the ratio 1:2:3 and their average is 600.if A is increases by 10% and B is decrease by 20%,then the average increased by 5%, C will be increase by ?
180
171
162
150
177
Option A
sum of A, B and C = 600 × 3 = 1800
A = 300, B = 600, C = 900
Now A = 330, B = 480
Average = 630 630 × 3 = 330 + 480 + C
C = 1080
C will be increased by 180

3. Suhas decided to donate 15% of his salary. On the day of donation he changed his mind and donated Rs.1,650 which was 11/15th of what he had decided to donate earlier. How much is Suhas’ salary?
Rs.1600
Rs.1300
Rs.1500
Rs.1200
Rs.1000
Option C
11/15*15/100*x = 1650
=>x = Rs.1500

4. A tap can empty a tank in one hour. A second tap can empty it in 30 min. If both the taps operate simultaneously, how much time is needed to empty the tank?
50 min.
10 min.
40 min.
30 min.
20 min.
Option E
Required time = 1/[1/60+1/30] = 20 min.

5. A and B started a business with initial investments in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A’s investment was 7 months, B invested the money for
40 months
10 months
70 months
50 months
30 months
Option B
Let initial investments be 5x and 7x.
Let B invested money for months y months (5x+7)/(7x*y) = ½
=>y = 10 months

6. 7802 + 132 − 8963 + 1326 =?×33
5
8
9
4
6
Option C
7802 + 132 − 8963 + 1326 =?×33
=>9260 – 8963 = ? × 33
=>? = 297/33 = 9

7. 21.9% of 650 = ? + 23.12
115
111
112
110
119
Option E
21.9% of 650 = ? + 23.12 =>142.35 = ? + 23.12
=>? = 119.23 == 119

8. 14.5% of 740 – ?% of 320 = 87.3
9
8
6
5
4
Option C
14.5% of 740 – ?% of 320 = 87.3
=> 107.3 – 87.3 = ?/ 100 ×320
=>? = 20×100/320 = 6.25 == 6

9. 85% of 420 + ?% of 1080 = 735
32
30
31
35
36
Option D
85% of 420 + ?% of 1080 = 735
=>85/ 100 ×420 + 𝑥/100 ×1080 = 735
=> x = 35

10. 30% of 1225 – 64% of 555 = ?
18
10
16
14
12
Option E
30% of 1225 – 64% of 555 = ?
=>? = 367.5 – 355.2 = 12.3 ==12