Find the value of "?" in the ball picture Riddle below:

Through your logical capabilities, can you make 7 an even?

Solve the counting riddle by identifying the number of triangles in the given picture.

I am white when I am dirty, and black when I am clean. What am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?