40 ways.
41
The answer is 100/(20p) = 5/p
I make it 4,562.
1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
18
Two 20p coins and one 5p coin make 45p.
one isnt the 20p, the other one is
There are 67 ways.
Each 20p coin weighs 5 grams... Therefore - there would be 3632 coins (valued at 726.40)
There are 47 ways using 5p, 10p, 20p and 50p.
One is a 10p, the other one is a 20p.