What if the cookies cost another amount of money? Is it always possible to make a total using every number of coins between the minimum and the maximum?
****** Part 2: Lollipops
Barney encounters a mathematically-minded till guy...
How many ways are there of making different amounts using just 1p and 2p coins?
Which totals have the same number of ways?
Is there a quick way of working out the number of ways of making an amount with just 1p and 2p coins?
What if we just used 1p and 3p coins instead?
Or just 1p and 4p coins?
***** Part 3: Sweets
As closing time approaches, the gang investigate one last problem...
Remember, you should find there are 15 ways altogether!
Can you describe a method for working out how many ways there are to make any amount using 10p, 5p, 2p and 1p coins?
What if you also had 20p, 50p coins?
It might get very time-consuming even if you have a good method!
Kevin suggests: could you write a computer program to help?
*****
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