Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

They are three errirs in this question. Can you find them?

When we see 2 but call 10?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What happened when the wheel was invented?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Replace the question mark in the picture below.

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

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.