I’m tall when I’m young, and I’m short when I’m old. What am I?

If 21x = 79x, what is the value of x?

How many letters are in the alphabet?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

When we see 2 but call 10?

There are five people. One of them shot and killed one of the other five.
We know following clues:
1. Dan ran in the NY City Marathon yesterday with one of the innocent men.
2. Mike consider being a farmer before he moved to the city.
3. Jeff is a top notch computer consultant and wants to install Ben new computer next week.
4. The murderer had his leg amputated last month.
5. Ben met Jack for the first time six months ago.
6. Jack has been in seclusion since the crime.
7. Dan used to drink heavily.
8. Ben and Jeff built their last computers together.
9. The murderer is Jack's brother. They grew up together in Seattle.

Consider yourself to be a famous detective "Sherlock Homles", Can you find the killer?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?