John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

What brings you down but never up?

Replace the question mark with the correct number.

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?

Find the next number in the series.
1 10 24 43 67 ?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What is black when you buy it, red when you use it, and gray when you throw it away?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?