If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What does does this rebus picture means ?

Can you count the number of triangles inside a triangle?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

Can you find out the number of the parking space in which the car is parked?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

I have branches, but no fruit, trunk or leaves. What am I?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?