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

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Count the number of squares in the picture below.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

Bay of Bengal is in which state?

What does this mean?

CCCCCCC