Solve the following series:
AZ, GT, MN, __, YB

Forwards I am heavy, backward I am not. What am I?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

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

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

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

What can you see in the middle of March and April that you can never see in any other month?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?