A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

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

If it took eight men ten hours to build a wall, how long would it take four men to build it?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

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

What type of tree can I carry in my hand?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?