John walks into the daily grocery shop and steals a $100 bill from the shop. An hour later John returns to the shop and buys some daily products for $40. John pays the owner the $100 bill and therefore the owner returns him $60.

How much money did the owner lose?

If six children and two dogs were under an umbrella, how come none of them got wet?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

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

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

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

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