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?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Why is the longest human nose just 11 inches?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

I’m orange, I wear a green hat and I sound like a parrot. What am I?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?