2021 JMPSC Problems/Problem 2
Revision as of 18:22, 10 July 2021 by Mathdreams (talk | contribs) (Created page with "== Problem == Brady has an unlimited supply of quarters (<math>0.25), dimes (</math>0.10), nickels (<math>0.05), and pennies (</math>0.01). What is the least number (quantity...")
Problem
Brady has an unlimited supply of quarters (
0.10), nickels (
0.01). What is the least number (quantity, not type) of coins Brady can use to pay off $$ (Error compiling LaTeX. Unknown error_msg)2.78$?
== Solution ==
To minimize the number of coins, we need to maximize the amount of high-valued coins we use. 11 quarters are worth$ (Error compiling LaTeX. Unknown error_msg)
, which is the most quarters we can use to get a value less than or equal to $$ (Error compiling LaTeX. Unknown error_msg)2.78
, so the answer is 
.
