What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Why is a river so rich ?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

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

What makes this number unique: 8,549,176,320?

What is the next number in this series?

4,12,84,3612....