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

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Can you write down eight eights so that they add up to one thousand?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

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

Count the squares in the matchstick puzzle below?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Can you find the hidden animal in the picture below?

I look at you, you look at me I raise my right, you raise your left. What am I?