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?

Find the missing number in the image below.

Which tank will fill first?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

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

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

If six children and two dogs were under an umbrella, how come none of them got wet?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?