If it took eight men ten hours to build a wall, how long would it take four men to build it?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I am quite hot but become too cold if you remove the first two letters. What am I?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

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

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?