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

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

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 ?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Can you solve the maths in the below-given picture equation?

If two's company, and three's a crowd, then whats four and five ?

Do You See It?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?