What question can you never answer yes to?

Can you find a rabbit in the given picture?

What is the longest word in the dictionary?

Can you find the thief by just looking at the picture below?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Can you name some countries which do not have the alphabet 'A' in them?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?