If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Give it food and it will live; give it water and it will die.

What can you see in the middle of March and April that you can never see in any other month?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

Can you solve the below geography rebus by decoding the below rebus ?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Two friends were stuck in a cottage. They had nothing to do and thus they started playing cards. Suddenly the power went off and Friend 1 inverted the position of 15 cards in the normal deck of 52 cards and shuffled it. Now he asked Friend 2 to divide the cards into two piles (need not be equal) with equal number of cards facing up. The room was quite dark and Friend 2 could not see the cards. He thinks for a while and then divides the cards in two piles.

On checking, the count of cards facing up is same in both the piles. How could Friend 2 have done it ?