2, 3, 5, 9, 17, _ What is the next number in the sequence?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

What is red and smells like blue paint?

What does this Rebus Picture mean?

What can you see in the middle of March and April that you can never see in any other month?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

You need to arrange three 7 and mathematical symbols to form number 1?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?