Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Can you solve this picture maths equation?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Different lights make me strange by changing me into different sizes. What am I?

What is the longest word in the dictionary?

What do you call a fish without an eye?

What does this mean?

CCCCCCC

What is both possible and impossible at the same time?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?