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

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

I have no life, but I can die. What am I?

How can a man go eight days without sleep?

What do you see in the image below

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Mr. Buttons was all set to go to the village of Buttonland to meet his friend. So, he packed his bags and left for the village at 5 in the morning. Upon travelling on a road for miles, he came across a point where the road diverged into two. He was confused on which road to take. He gazed around and he saw two owls sitting on a branch. He thought he could ask for directions for the village from the two owls. So he went to the tree. There he saw a sign which read, "One owl always lies, and one is always truthful. They both fly away if you ask them more than 1 question."
Mr. Buttons was caught in the dilemma of what to ask? And from which owl to ask, since he only had one question. What should Mr. Buttons ask?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

How many triangles are there on the puzzle below?