Well, you could always use your times tables but that would take quiet a rather long time. So um yeah times tables maybe? I still cant work it out I need it for my homework! :S
150 10p coins.
how many ways to make 25p using 1p 2p 5p 10p 20 coins
51
40
22
3
5p+5p
21 ways
5
2 quarters and 5 dimes
There are 6 ways using normal U.S coins, but their is probally a different amount using foreign coins....... :-)
1