2014 UNM-PNM Statewide High School Mathematics Contest II Problems/Problem 8
Problem
A certain country uses bills of denominations equivalent to 
and 
. The ATM
machines in this country can give at a single withdrawer any amount you request as long
as both bills are used. Show that you can withdraw 
if and only if you cannot withdraw
, where x + y = 
.
Solution
See also
| 2014 UNM-PNM Contest II (Problems • Answer Key • Resources) | ||
| Preceded by Problem 7 |
Followed by Problem 9 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 | ||
| All UNM-PNM Problems and Solutions | ||
