Puzzle 65 - Solution
The quiz was
Terry is half as old as Alice was when Alice was 5 years old than Terry is now. What is Terry's age now?
Solution:
alice then = terry+5
terry = alice then /2 = (terry+5)/2
2 terry = terry+5
terry = 5.
Puzzle 9 : The 4 coins problem
Solution to puzzle 8: Maria is not counting Sundays. So she is not counting 1/7th of days of her age. That is to say she is only counting 6/7th of her age. 6/7th of her age = 30 Her actual age = 30 X 7/6 = 210/6 = 35 years. Puzzle 9 : The 4 coins problem You’re creating a new coin system for your country. You must use only four coin values and you must be able to create the values 1 through 10 using one coin at a minimum and two coins maximum. What 4 coins do you choose, and can you think of a second set of 4 coins that achieves the same goal?
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