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

There is something which you can be arrested for attempting but not for successfully completing.

What does a man do only once in his lifetime, but women do once a year after they are 29?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

How could a baby fall out of a twenty-story building onto the ground and live?

O_er_t_o_

Complete the missing letters of the given word.

What brings you down but never up?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

I am white when I am dirty, and black when I am clean. What am I?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?