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

There was a strange boy who was born before his father. How can this be possible?

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

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Which tank will fill first?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

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