Why is 6 afraid of 7?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

How many times can you subtract the number 5 from 25?

Detective John was investigating a murder in China.
It was a difficult case, and John was completely stumped until he noticed a message sent to him by the killer cunningly hidden in a newspaper advertisement selling Car Licence Plates.
Detective John thought about it for a while, and when he had solved the puzzle, immediately arrested the guilty man.

Q1) How did John know the advert was a clue for him?

Q2) Solve the code and tell me who John arrested.

This is the newspaper advert (Car licence plates for sale) that Detective John saw.

Plates For Sale;

[W 05 NWO]
[H 13 HSR]
[O 05 EBM]
[D 08 UNE]
[U 10 HTY]
[N 04 BRE]
[N 16 TTE]
[I 26 LHC]
[T 10 AEE]
[I 26 CNA]
[X 22 VDA]

What number comes next in this sequence:
7 8 5 5 3 4 4 _

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

A bomb exploded in a room full of married couples and no one died. How?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

I have teeth but i don't bite. Who Am I ?