What number should come in place of the question mark below?

What does Alexander the Great and Winnie the Pooh have in common?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

Make a sentence consisting of three words that have the whole alphabet.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

Find the hidden panda in the image below.

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?

It is always ahead of me yet I can never see it. What is it?

What is the next number in the series?

15 29 56 108 208 ?