Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

People put me on the table and cut me but do not eat me. What am I?

Can you solve this picture maths equation?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

Can you count the number of triangles in the picture below?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.