Math Problem (1 Viewer)

[chokoholic]

Here is the question:-
If you have 50c, $2 and $1 coins, in how many ways can you make up $10?

The answer is 21, but it took me ages to work out because I was writing each way down.

Like this
50c x 7 + $2 x 1 + $1 x 1
50c x 6 + $2 x 2
50c x 6 + $2 x 2 + $1 x 1
and so on....

Anyone have a quicker and easier way?
Thanx

 

[virgin^sexy]

i could be wrong, but what you did is probably the easiest way. trial and error always works, even if it takes a long time.

 

[velox]

mayb application of series and sequence?

 

[virgin^sexy]

i dont think i'd learnt that at that stage of yr 10. actually i still dont know what it is =\

 

[velox]

still, its not hard to learn

 

[chokoholic]

Originally posted by wrx
mayb application of series and sequence?

Ok, then do this using series and sequence

 

[dark`secrets]

Originally posted by chokoholic
Ok, then do this using series and sequence

being in yr 10 would you understand the concept? since its like a year 11 topic?

 

[chokoholic]

It's just an year ahead....I'll be able to understand!

 

[chokoholic]

Why would my teacher care? I mean it's not like he would be checking out my working out, when I'm doing the australian maths competition...so I don't think it matters, which method I use, as long as I get it RIGHT!

 

[Sarah168]

i did series in yr 10 adv

 

[dark`secrets]

Originally posted by Sarah168
i did series in yr 10 adv

really? lol i dont think i did
was it a whole topic?

 

[chokoholic]

Originally posted by Without Wings
oh well u didnt say it was for maths comp so i assumed it was for in class...sorry

hmm i dont remember wot i did in year 10

No need to be sorry!

I just need this problem to be worked out, it's killing me!