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

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

A father's child, a mother's child, yet no one's son.

Who am I?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

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

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

I have eight fingers and two thumbs but I do not live. What Am I?

What is always in front of you but can’t be seen?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?