SOLUTION: If Bryan wants to mail a package, which requires $1.53 in postage, and has only 5-cent and 8-cent stamps, what is the smallest number of stamps he could use to total $1.53?

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Question 252380: If Bryan wants to mail a package, which requires $1.53 in postage, and has only
5-cent and 8-cent stamps, what is the smallest number of stamps he could use to
total $1.53?
Found 2 solutions by checkley77, richwmiller:
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
8*16+5*5=153
128+25=153
153=153
Answer=21 stamps (16 8 cent+5 5 cent stamps are needed.)

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
We know he must use at least one 8 cent stamp to get the 3 of 153
that leaves us with 145
8*15=120
anything more than that leaves odd amounts that don't meet our criteria of 0 or 5
we need an amount that ends in 5 or 0 so that we can use the 5 cent stamps to complete
so 16 8 cent stamps and 5 5 cent stamps is the smallest number of stamps he can use to mail his package