Bay of Bengal is in which state?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?

Can you find out the total number of triangles in the given figure?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?