Question
Statement: All books are copy. Only a
few books are pen. Some copy are pencil. Conclusion: I. Some books are not copy. II. Some pencil are books. III. Some pen are not copy. IV. Some copy are pen. In each of the questions below are given some statements followed by some conclusions. You have to take the given statements to be true even, if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known factsSolution

Three pipes A, B, and C can fill a tank in 15 hours, 20 hours, and 25 hours respectively. All three pipes are opened together, but after 4 hours, pipe C...
A tank is filled by 3 pipes, second pipe take 5 hours more than first pipe and 5 hours less than third pipe to fill the tank alone. If second and third ...
Pipe A can fill a tank in 12 hours and pipe B takes 18 hours to fill it. Both pipes were open together and a leak was spotted which increased the fillin...
If a tank can be filled by a tap in 10 hours, but due to an outlet, it actually takes 5 hours longer to fill the tank, find the duration in which the o...
- Pipe 'A' is 5 times as efficient as pipe 'B'. Pipe 'C', which is one-fifth as efficient as pipe 'B', can fill a tank alone in 25 hours. Find difference bet...
Pipe A and Pipe B together can fill the tank in 24 hours. The capacity of the pipe A is 25% of the capacity of the pipe B. How much time will pipe B alo...
Pipe βAβ can fill a tank in 30 hours while pipe βBβ can empty it in 40 hours. They were operated on alternate hours starting with pipe βAβ. ...
Pipes 'J' and 'K' can fill a tank in 12 hours and 18 hours respectively, while pipe 'L' can empty it in 36 hours. All pipes are opened together when the...
Two pipes G and H can fill a cistern in 40 minutes and 50 minutes respectively. If both are opened together, after how many minutes should pipe G be shu...
A tank can be filled by pipe M in 20 hours and by pipe N in 30 hours...