Replace the question mark with the correct number in the below-given picture?

What can go up a chimney down, but can’t go down a chimney up?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

How many words can a pen with half refill write?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

What does does this rebus picture means ?

The dirtier I get, the whiter I look. Who am I?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

What word is represented by this rebus?