# Mixed Quantitative Aptitude Questions Set 233

1. A container which contains 80 liters of milk and water in the ratio of 3 : 2. How much quantity of mixture should be replaced with water so that in the final mixture, ratio of milk to water is 9 : 11 ?
25 liters
32 liters
28 liters
20 liters
42 liters
Option D
Quantity of milk = 80 * 3 /5 = 48 liters
Quantity of water = 80 * 2 /5 = 32 liters
let ‘x’ liters of mixture is replaced with water.
(48 – x * 3/5 ) / (32 – x * 2/5 + x) = 9/11
x = 20 liters

2. Ram bought a chair for rs.480 and marked is at rs.720. If he made a profit of 25% on selling the table then find percentage discount allowed by Ram on the chair ?
15%
20%
18%
45%
16.67%
Option E
SP of chair = 480 * 125/100 = 600
MP = 720
discount percentage = 720 – 600/720 * 100 = 16.67%

3. A alone can do a work in 25 days whereas B and C together can do some work in 20 days. A and B together worked for 8 days then A left the work. If efficiency of C is half of efficiency of A, then in how many days remaining work will be completed b A and C together ?
5 days
7 1/3 days
15 days
8 days
14 days
Option B
LCM of 25 and 20 = 100
efficiency of A = 100/25 = 4
efficiency of B and C = 100/20 = 5
efficiency of C = 4/2 =2
efficiency of B = 5 – 2= 2
A and B worked for 8 days = 8 ( 4 + 3) = 56 work
remaining work = 100 – 56 = 44
remaining work will be completed A and C together = 44/4 + 2 = 7 1/3 days

4. Train A travelling at 72 km/hr crosses a platform of 160 m in 18 seconds and train B travelling at 90 km/hr crosses the same platform in 15 seconds. Find the length of train B ?
320m
240m
210m
225m
215m
Option E
Speed of train A = 72 * 5/18 = 20 m/sec
distance covered by train A = 20 * 18 = 360 m
length of train A = 360 – 160 = 200m
speed of train B = 90 * 5/18 = 25 m/sec
distance covered by train B = 25 * 15 = 375 m
length of train B = 375 – 160 = 215 m

5. A is 6 years younger than B and ratio of present age of B to C is 12 : 5. If ratio of present age of A to C is 2 : 1, then find present age of B ?
32 years
34 years
42 years
36 years
40 years
Option D
Let present age of B = 12x
age of C = 5x
age of A = 12x – 6
12x – 6/5x = 2/1
12x – 6 = 10x
2x = 6
x = 3
present age of B = 12 * 3 = 36 years

6. Directions : What will come in place of questions marks ( ? ) in the following questions below ?
35% of 320 + 440 – âˆš1024 = ?
540
320
340
620
520
Option E
112 + 440 – 32 = ?
? = 520

7. 124 * 4 – 320 Ã· 5 + âˆš361 – 18 = ?
225
320
435
433
520
Option D
496 – 64 + 19 – 18 = ?
? = 433

8. 495 Ã· 5 + (21)^2 – (20)^2 = ?
324
420
325
140
260
Option D
99 + 441 – 400 = ?
? = 140

9. 1240 + 2520 – 3540 + 4250 = ?
4340
5470
4240
3450
4470
Option E
? = 8010 – 3540
? = 4470

10. (12)^2 + (18)^2 – (20)^2 + (14)^2 = ?
365
264
345
420
540
Option B
144 + 324 + 196 – 400 = ?
? = 264