John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

What does this rebus means ?

PROG WORKRESS

What number when divided in half becomes zero?

People put me on the table and cut me but do not eat me. What am I?

You can see it everyday, But cannot touch it at will. What is it?

Do you know who was buried in John's tomb?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?