Spot what is wrong here in below Picture?

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

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?