Tag: math & puzzles

A tank has four pipes attached to it. The first one takes 60 hours to fill the tank, second one takes 80 hours to do the same, third one takes 40 hours to empty the tank and the fourth one takes 720 hours to empty the tank. Four taps are opened at the same time. How long will it take to fill the tank if the tank is half-filled before opening the taps?

Two runners started running from a particular point. The first runner runs 60 KMPH towards East and the second 80 KMPH towards North. Both the runners stop after 30 minutes. A third runner starts from the point where the first one stopped. How long will he take to reach the point where the second runner stopped if the third runner runs 100 KMPH?

Grade O=10 Points Grade E=9 Points Grade A=8 Points Grade B=7 Points Grade C=6 Points Grade D=5 Points Grade F=4 Points A Student had Science, History, Language, Math and Science Practical courses each of 4 hours credit and score D in Language, C in History, A in Science, E in Math and O in Science Practical. How much he scored in a 10 Point Scale?

Pick the Odd One Out

A runner who was running at fourth position in a race overtakes the runners running just ahead of him. What is the position of the runner in the race after the overtake?

A monkey is climbing a 10 meters long bamboo. It climbs 2 meters a second and slips 1 meter in the next second. How long will it take to climb the bamboo?

The engine of a 200 meters long tarin reaches one end of a 500 meters long platform at 4:00 pm. The train stops at the platform for 30 minutes. If the train starts from the platform at 70 KMPH, then what will be the time when the train completely crosses the platform?

A two digit number when reversed is 9 greater than the original one. The sum of the digits is a factor of the original number as well as the reversed one and the product of the digits is a factor of the original number, but not of the reversed one

A man standing near the root of a 60 meters long cocounut tree and sees its 60 meters long shadow (created by sunlight) in front of him. What is the angle of the sunlight with the direction of the man's vision

A tank has four pipes attached to it. The first one takes 60 hours to fill the tank, second one takes 80 hours to do the same, third one takes 40 hours to empty the tank and the fourth one takes 720 hours to empty the tank. Four taps are opened at the same time. How long will it take to fill the tank if the tank is half-filled before opening the taps?