What is the next number in the series?

15 29 56 108 208 ?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

How could a baby fall out of a twenty-story building onto the ground and live?

What has one letter and starts with an E?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

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

(it's a funny riddle)

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

I have two sand hourglasses:
1. A 7 minute one and
2. An 11-minute one.

Using just these 2 sand hourglasses, how can I measure time as 15 minutes?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?