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

Take one out and scratch my head, I am now black but once was red. What am I?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

What is the next number in this matchsticks series riddle?

What building has the most stories?

My thunder comes before lightning.
My lightning comes before my rain.
My rain dries up all the land it touches.

Who am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?