There is a saying that you
cannot add apples and oranges. If you have 3 apples and 2 oranges do you have 5
apples? No. Do you have 5 oranges? No. You have five fruits, but the number of
apples and oranges has not changed. Similarly, you cannot add real money and
"what they think they paid"....
When we count only real
money, the students have $3, the clerk has $2, and the manager has $25. That is
$30 total.
Accounting
of Real Money
|
||
|
Before
|
After
|
Student
#1
|
$10.00
|
$1.00
|
Student
#2
|
$10.00
|
$1.00
|
Student
#3
|
$10.00
|
$1.00
|
Clerk
|
$0.00
|
$2.00
|
Manager
|
$0.00
|
$25.00
|
Total
|
$30.00
|
$30.00
|
THE MAIN PROBLEM THAT MANY PEOPLE UNDERGO IN SUCH PROBLEM IS THAT THEY SUBTRACT 3$ from 30 $ . BUT NOT ABLE TO UNDERSTAND THAT 30 IS THE AMOUNT WITH THE MANAGER AND 3$ IS WITH STUDENT SO CANNOT BE ADDED OR SUBTRACTED
One reader sent the following comment:
There is no missing dollar. The students have paid $27 and have kept $3 for themselves and that adds up to $30. Not a real puzzle... just a mistake in math! You cannot tally the clerks total twice, it's already included in the $27 the students have paid. The equation is incorrect...if they paid $27 and the clerk kept $2...then that does not add up to anything.
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