This is a really cool game. Amaze your friends with this weird maths trick.
1. Ask them to think of a number. (In their head)
2. Double it.
3. Add 10 to the number.
4. Divide by 2.
5. Subtract the original number.
The answer is 5 (It always will be)
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Three men walk into an hotel and ask for a room with three beds for one night. The man at the hotel tells them that the cost will be 30 dollars. They pay 10 dollars each and go up to their room. After a little while the man knocks at their door, and apologizes for a mistake he made when dealing with them at the front desk. He charged them the high season rate and not the low season one, so he owed them a refund of 5 dollars.
The three men are happy and appreciate the honesty of the man, so they decide to only take a refund of one dollar each from these 5 dollars and will give him the other two as a tip to thank him for his honesty.
The man thanks the guys and walks out.
Now, they paid 10 dollars each (30 in total). They take back 1 dollar each (3 dollars in total). In this way the have paid 10-1=9 dollars each. So in total they have now paid 9x3=27 dollars. Plus the 2 dollars tip given to the man we get 27+2=29 euros. Hey?!
There is a missing dollar here! Can you find it? |
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