Which country gets ill every time?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Look at the picture and find out which square is not linked with any of the other squares.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

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?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

The centre of the third figure is empty. What digit should fit inside?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?