"Mathematics is really dead" Solution

As promised, here is the solution for "Mathematics is really dead" quiz.

The problem lies with $25 Pizza and it’s not $27.
They cannot calculate in this way. They have misled us.
Logically if that pizza is cost $27 then you won’t have such problem.

$9x3 =$27. That pizza should cost $27 and $3 (pay back) which mean the delivery boy does not have any tip.

However, delivery boy cheated on the 3 guys.
So the guys assume that the pizza is $27 but actually it is $25.

(This is the twisted part that makes the whole thing not valid)

$30-$25=$5
$5-$3(pay back) = $2 (tip)

So there is no missing dollar. The fault lies with the delivery boy who twisted the whole situation.

It’s really playing round with the words rather than figures in the actual calculation. Don't take in everything that people say... because sometimes people might twist their words to benefit their own needs. Sometimes we need to think through whether this person is trustworthy or not...

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