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

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

How many bananas can you eat if your stomach is empty?

What country can make you shiver?