Widget Digits by Bob Stanton in GAMES World of Puzzles May 2015
If you pay for a $50.00 widget with a hundred-dollar bill, your change will
contain the same set of digits -- one five and three zeroes -- as the purchase price.
Can you find all the other prices whose change from a hundred-dollar bill contains the
exact same set of digits as the purchase price?
Solution to the Problem:
There are eight solutions besides $50.00:
$54.50, $45.50, $63.50, $36.50, $72.50, $27.50, $81.50, and $18.50.
($90.50 and $09.50 are a bit of a stretch)