What is the next number in this matchsticks series riddle?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

How many sides does a circle have?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?