If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

What does the below rebus riddle means?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

What four weights can be used to balance from 1 to 30 pounds?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Can you find the mistake in the below statement?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?