By a pencil on paper
Let's say, hypothetically, that a basketball is twice the size of a volleyball. And, a volleyball is three times the size of a baseball. So, if a basketball has 12 pounds of air pressure, how much air pressure will a baseball have?
In an interview, a boy was asked an unusual question ‘How two persons sitting with a table in between them can’t see each other?’ He was unable to reply. Can you?