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

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

How many times can you subtract the number 5 from 25?

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

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

What is wrong in the below Picture?

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?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?