# ZS Associates Aptitude-Paper 5

1. If a boat is moving in upstream with velocity of 14 km/hour and goes downstream with a velocity of 40 km/hour, then what is the speed of the stream?
A. 13 km/hr
B. 26 km/hr
C. 34 km/hr
D. none of these

2. Find the value of ( 0.75 * 0.75 * 0.75 – 0.001 ) / ( 0.75 * 0.75 – 0.075 + 0.01)?
A. 0.845
B. 1.908
C. 2.312
D. 0.001

3. A can have a piece of work done in 8 days. B can work three times faster than A. C can work five times faster than A. How many days will they take to do the work together?
A. 3 days
B. 8/9 days
C. 4 days
D. can’t say

4. A car travels a certain distance taking 7 hours in forward journey. During the return journey increased speed 12km/hour takes the times of 5 hours. What is the distance travelled?
A. 210 kms
B. 30 kms
C. 20 kms
D. none of these

5. Instead of multiplying a number by 7, the number is divided by 7. What is the percentage of error obtained ?

6. Find (7x + 4y ) / (x-2y) if x/2y = 3/2 ?
A. 6
B. 8
C. 7
D. data insufficient

7. A man buys 12 litres of liquid which contains 20% of the liquid and the rest is water. He then mixes it with 10 litres of another mixture with 30% of liquid. What is the % of water in the new mixture?

8. If a man buys 1 litre of milk for Rs.12 and mixes it with 20% water and sells it for Rs.15, then what is the percentage of gain?

9. Pipe A can fill a tank in 30 minutes and Pipe B can fill it in 28 minutes. If 3/4th of the tank is filled by Pipe B alone and both are opened, how much time is required by both the pipes to fill the tank completely?

10. If on an item a company gives 25% discount, they earn 25% profit. If they now give 10% discount, then what is the profit percentage?
A. 40%
B. 55%
C. 35%
D. 30%