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?

What goes up but never comes down?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Identify the hidden meaning behind this picture?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?