Difference between revisions of "2021 JMPSC Problems/Problem 2"
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Revision as of 19:22, 10 July 2021
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 .