The centre of the third figure is empty. What digit should fit inside?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Count the number of triangles in the below picture?

What will you call your mother's brother's brother-in-law?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

In the four images below, can you find the odd one out?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209