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.

I travel all around the world but always stay in the corner. What am I?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What's a single-digit number with no value?

Solve the mathematical equation in the picture below.

You need to remove two matchsticks to make the below equation true. Can you do it ?

Prove that the below maths equation is true.

8 + 8 = 91

Can you write down eight eights so that they add up to one thousand?