What has many keys but can’t open a single lock?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

There is an ancient kingdom where every married woman keeps information regarding the fidelity of other men. However, what they don't know is the fidelity of their own husbands. Also, there is an ancient belief that they don't tell each other about the fidelity of their husbands.

On a certain day, the queen of the kingdom declares that she has identified at least one unfaithful man in the kingdom. She allows the wives to identify and gives them authority to kill their husbands if they are unfaithful at midnight.

How will the wives manage it?

In the picture given below, can you find out which digit will take place of the question mark?

Complete the table series riddle by finding the number that can replace "??".

What jumps when it walks and sits when it stands?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

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

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;

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[H 13 HSR]
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[N 16 TTE]
[I 26 LHC]
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[I 26 CNA]
[X 22 VDA]