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

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

O_er_t_o_

Complete the missing letters of the given word.

How can you make number one disappear by adding something to it?

When 99 is considered higher than 100?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?