This is a collection of puzzles, some general, some mathematical. Most are on the harder side, so play at your own risk. Have fun!

Question 1:

A kid found two old coins. The first coin said it was minted in 43 BC, while the other said it was minted during the reign of Emperor Nicholas I. Which of the coins was fake?

A contestant on a TV show had to answer 26 questions. For each correct answer he received 8 points, while a wrong answer penalized him 5 points. How many answers did the man answer correctly, bearing in mind that he eventually had 0 points?

Let's suppose that I offer you a bet under the following conditions: I bet $1 and claim that if you give me $5 I will give you $99 in return. Will you gain something from this bet?

You have 5 fingers on one of your hands. On both you have 10 fingers. How many fingers do you have on your 100 hands?
(place mouse pointer over ? icon to view hints or answer requirements)

Question 5:

You can divide the numbers 111, 222, 333, 444 and 555 by 1, 3 and 111 and there will be no remainder. By what other whole number can you divide them so by that there is no remainder?

Question 6:

You can put something between the digits 2 and 3 so that the resultant number is bigger than 2 and smaller than 3.

You have a square and a circle and the perimeter of the square is equal to the circumference of the circle. Which of the two figures covers a bigger area?