7. If you allow for change, an infinite number of ways; eg 1 x 10p with 1 x 2p change or 1 x 10p with 2 x 1p change, etc.
5p x 2p = 10p, then 10p / 4p = 2 remainder 2
7p-10p = -3
1 out of 20 of 200 pound is 10 pound! For it to be 10p it would have to be 1 out of 2000.
17p = 2p + 5p + 10p
The idea is to subtract 10p minus 4p.
10P
5 pounds of 10p coins would weigh 5 pounds, as the denomination of the coin doesn't affect the weight.
10p
10p
10p
10p
10p
15 cents
20
7. If you allow for change, an infinite number of ways; eg 1 x 10p with 1 x 2p change or 1 x 10p with 2 x 1p change, etc.
In the UK, from about 10p to about 40p.