Which alphabet letter is a question?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

What does this rebus riddle means ?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

Why Aeroplane windows are round?

How is a fly different from a mosquito?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What's a single-digit number with no value?