To make $10:
1 10$ Bill
OR
2 5$ Bills
OR
1 5$ bill AND 5 1$ bills
OR
10 1$ Bills
All will make exactly 10$
Your question is a little vague; if the question is what is the maximum amount you can achieve with only 10 bills, 1s, 5s, and 10s, the answer would be 10 * $10 bills, or $100.
However, it sounds like you might have missed part of the question; it sounds like you meant "How many of $10, $5, and $1 bills can I use [to make $xxxx] if I only can use 10 [bills]?"
So, if the question was something like, "How many of $10, $5, and $1 bills can I use to make $77 if I only can use 10 bills?", the answer would be like this:
First, divide by the biggest number of bills (also called the bill denomination when dealing with money) first. So, $73 / $10 = 7.3. Well, you can't exactly get away with tearing a third of a ten dollar bill, so start with the number BEFORE the decimal, which is 7. So, you can use 7 $10 bills. 7 x $10 = $70, which leaves $7 left. Next, divide $7 by the next denomination down, $5. 7 / $5 = 1.4. Again, no ripping up money, so use the number BEFORE the decimal again, which is 1. So, now you are up to 7 $10 bills, and 1 $5 bill. (7 x $10) + (1 x $5) = $70 + $5 = $75. Now you are only looking to find the last $2, so use two $1 bills. So, you have:
7 x $10 Bills = $70
1 x $5 Bills = $5
2 x $1 Bills = $2
7+1+2 = 10 bills, and $70 + $5 + $2 = $77!
I hope this helped, and be a little more careful next time with a question, and make sure you don't miss any parts of the question!
