How many times do a clock's hands overlap in a day ?

By moving just one matchstick, you need to make the below statement true. Can you do it?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

What do you call a fish without an eye?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

Which is faster, Heat or Cold ? Explain.

If eleven plus two equals one, what does nine plus five equal?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Which is Odd One Out and why?

4377

3954

9862

8454

9831