Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What is the next number in the series?

15 29 56 108 208 ?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Can you replace the question mark with the correct number?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"