3 men order coffee at a café. The price is $1 each. So, they hand the waitress the $3 and she goes to get the coffee.
At the cash register the manager stops her and says “These 3 men are regulars. Give them 50 cents change.
But the waitress is dishonest and on the way back to the table she pockets 20 cents and gives the 3 men 10 cents each.
Therefore the men have each paid 90 cents for their coffee.
So, 3 coffees at 90 cents each = $2.70
20 cents in the waitress's pocket = $2.90
Where is the other 10 cents?
