Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

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

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

A sundial has the fewest moving parts of any timepiece. Which has the most?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I cannot talk, but I always reply when spoken to. What am I?

How many triangles are there in the picture below?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?