One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

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

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

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

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

Can you place three balls such that the equation shown in the picture holds true?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?