Find the missing letter in the last circle logically in the given below picture.

Can you find a five letter word that is left with only two letters if one is removed?

Can you place six X (crosses) in below board without making three in a row in any way ?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Can you find out the missing number in the grid?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

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

How many letters are in the alphabet?