Re: flawed thinking by numbers

Don't just trust numbers - think it through.

Category:

Education

Tags:

• flawed
• logic
• maths

[OonslaughtoO]

The easiest way to think about it is that you gave the waiter 30 and he gave you back 5 and you took 3 back.... So, you each paid 9 . Therefore 9x3=27 which is the bill plus the tip plus the 3 you took back... 25+2+3=30...........Which by the way is a horrible tip.

[thatgaybloke]

@OonslaughtoO Hey - we're British, what can I say?

:-)

[VicariousExtrospect]

*sigh*

Middle school students could tell you you're wrong.

[thatgaybloke]

Bloody hell, I should hope so.

[Tavereen]

The quantum wave form of the last bill/coin collapsed and it disappeared.

[thatgaybloke]

Or is it just than when they took their eyes of it, it ceased to exist?

[Barkspawn]

You added the 2 pound tip twice.

The 9 pound * 3 = 27 is correct and it should end there - the 25 pound meal plus the two pound tip = 27. Then you add in the 2 pounds again to get 29, and continue to work off flawed assumption, and end up asking a meaningless question.

[RegretfullyYes]

That thieving bastard of a waiter took it !!

[MrMZaccone]

Adding the tip instead of subtracting it is the problem, 10 - 1 = 9, 9 x 3 = 27, 27 - 2 = 25, the cost of the meal. At no point in time does ADDING the tip to get the number 29 make any sense at all.

[MethanolCH3OH]

I drew the whole thing out in MS Paint, and at no point did any money disappear: each friend has £1 at the end, and the waiter has £27. £27 + £1 × 3 = £30.

[jonnyqh]

Actually, this is a good example of flawed thinking by numbers. You're not paying £27 + a tip of £2, you're paying a bill of £25 + a tip of £2, which equals the £27 that came out of the pockets of the englishmen.

[SilentMarijuano]

no they paid 25 kept 3 one each and 2 tip which adds up to 30

[MrBigEnchilada]

lol this is dumb. its one thing to add wrong, it's another thing to add the wrong things!!! lol if you add the wrong things you will end up not knowing why did you even went wrong...

one way is to look at the payers' point of view

3 people pay 25, they keep 3 dollars, and $2 tips = $30 in total

another way is to look at the server's point of view

the server got 30 for a $25 bill, returned 3 dollars to the 3 people and then kept 2 for the tips, 25+3 + 2 = 30 in total.

[93tomb]

The £27 includes the tip, and the remaining £3 is what they took back. Had to watch it twice though, thought it was a bit fishy the first time. :)

[asasasarap]

The sum of money they payed is 3x9=27.25 for the food plus two for the tip.Everything is o.k

[Cakerolled]

AIDS AIDS