Which five letter word can be added at the end of below word to form a
valid word?

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What 5-letter word typed in all capital letters can be read the same upside down?

When is the top of a mountain similar to a savings account?

How can a man go eight days without sleep?

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?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

I can write cow in 13 letters.

Can You?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

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