Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Buy me, smell me or deliver me, I do not change.

Who am I?

Why do we preferably have round manhole covers and not square ones?

Which is faster, Heat or Cold ? Explain.

Move three sticks of the spiral below to form a square.

Which is heavier: a ton of bricks or a ton of feathers?

Can you count the number of quadrilaterals in the picture below?

I know a nine-letter word having only one vowel.
Do you ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.