What does this mathematical rebus means ?

What is the word or phrase?

Can you start the fire using two pieces of wood?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

I have branches, but no fruit, trunk or leaves. What am I?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?