A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

What question can you never answer yes to?

I am white when I am dirty, and black when I am clean. What am I?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Can you find the six hidden animals in the picture below?

What does this mathematical rebus means ?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?