John is the son of Jacob.
So,
Jacob is the_____of John's father?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

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

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

Who am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What can you deduce from the following BrainBat?

CRY
LMKI

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

What is the below Rebus indicate?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?