There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Replace the question mark in the picture below.

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

How can you take 2 from 5 and leave 4?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?