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

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

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 ?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What kind of tree can you carry in your hand?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

I am an odd number. Take away a letter and I become even. What number am I?

If an electric train is travelling south, then which way is the smoke going?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?