I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Find the next number in the sequence

5 12 24 36 ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Can you find out the missing number in the grid?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

How many triangles are there on the puzzle below?