I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Where do fish keep their money?

How many triangles are there on the puzzle below?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

My location can be determined by the below rebus.
So where am i ?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Which country gets ill every time?