Gcse Maths Coursework: Payphone Problem
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Gcse Maths Coursework: Payphone Problem
... GCSE Maths Coursework: Payphone Problem A payphone only accepts 10p, 20p, 50 p and £1 coins. 1 stands for 10p 2 stands for 20 p 5 stands for 50p £ stands for one pound In order to make sure I work out all the combinations correctly I will use a logical system. I will start with the call cost made up of the smallest coin type then add in the larger coin at the start and move it across one position for each combination. I will repeat this, changing the coin orders until it is needed Part 1. A woman has plenty of 10 p and 20p coins. She can put them in the phone in any order. Investigate the ways of making any call in multiples of 10 p. 10 p = 1 20 p = 11 2 30p = 111 21 12 40 p = 1111 211 121 112 22 50 p = 11111 2111 1211














