


Number
& Math Play
Profit
or Loss? 


Jill brought home a poster from her trip. She had
paid $25 for it. Liu saw the poster and gave Jill
$35 for it. A few days later, Jill bought the poster
back for $45. Then she sold it again, this time
to her cousin Allie for $55. Did Jill make money on her transactions, or
lose money?



Add up all the money that Jill spent ? $25
and $45 for a total of $70. Then add up all the
money Jill got for the poster ? $35 and $55
for a total of $90. Jill came out ahead by $20.
Source: Inspired by a puzzle
in Put on Your Thinking Cap, Helen Jill Fletcher.
New York: AbelardSchuman, 1968.



