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ROTW 9/27/2013
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You must answer both to win ROTW. Please PM or email your answers to me. | |
A) Place the numbers 1 through 9 in the circles in the linked image, such that each side of | |
the triangle adds up to 17 | |
http://www.expandyourmind.com/logicproblems/images/9numbers.gif | |
Answer: There are a number of answers, but one formula to get an answer is to put 1, | |
2 and 3 on the corners, and 7,8,9 on opposite sides. Then fill in the gaps with | |
the other numbers to make 17 on each side. | |
B) There are 100 coins scattered in a dark room. 90 have heads facing up and 10 have tails up. | |
You cannot distinguish (by feel, etc.) which coins are which. How do you sort the coins into two | |
piles that contain the same number of tails? (i.e each pile has the same number of tails up) | |
Answer: Create 2 piles, one with 10 coins and one with 90. Then, with the 10 | |
coin pile, flip all of them. The resulting piles will have the same number of tails. | |
It works =) |
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