Karen has a total of 17 bills in standard U.S. currency, of at least 3 different denominations (values). She has no $2 bills and no bills worth $100 or more. What is the positive difference between the maximum and minimum number of dollars Karen could have?
Not 100% of the currencies of the US, but I believe Karen could have
$1, $5, $10, $20, and $50 bills, she must have 3 different denominations.
She could have 15 one dollar bills, one 5, and one 10 for a minimum value of $30
She could have 15 $50 bills, one 20 and one 10, for a maximum of $780
for a difference of $750