Maths question (is impossible)

**LittleGrizzly** · 10-05-2004, 08:08

but they paid 10 pounds and recieved a pound back each making thier total contribution 27 pounds

**TonkaToys** · 10-05-2004, 08:46

Originally Posted by LittleGrizzly

but they paid 10 pounds and recieved a pound back each making thier total contribution 27 pounds

Why don't we do an experiment... you send me 30 pounds in 3 batches of 10 pound coins. I'll send you back 1 pound from each batch... perhaps we can figure it out that way.
I'm willing to keep trying until we figure it out!

**LittleGrizzly** · 10-05-2004, 08:59

Originally Posted by TonkaToys

Why don't we do an experiment... you send me 30 pounds in 3 batches of 10 pound coins. I'll send you back 1 pound from each batch... perhaps we can figure it out that way.
I'm willing to keep trying until we figure it out!

lol

**Mouzafphaerre** · 10-05-2004, 09:49

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LOL! Good one there!
_

**Papewaio** · 10-05-2004, 10:04

Start from the top.

3 guys, 10 pounds each. 30 pounds.

Shopkeeper makes a mistake, the total is 25 pounds.

Mates decide that it is a decent thing and give the shopkeeper and extra two pounds. Total for the TV is now 27 pounds.

Each of the mates pockets a pound each. For a total of 3 pounds change.

The confusion is that the Cost of the TV is 27 pounds and the guys have 3 pounds change to add to that total (not the amount the shopkeeper pockets for honesty).

**USMCNJ** · 10-05-2004, 10:10

i could never get this
30($ paid)-3($ back, $1 each) = 27
27-2(tip) = 25
30($ paid) -5 = 25 (real price)
25=25
how is this confusing?

**LittleGrizzly** · 10-05-2004, 10:30

look i realise it works one way but the point is it does not work the other

they each paid 9 pound each, 3 of them making 27 pound with a 2 pound tip for the honest shop keeper that makes 29 pounds. how does the pound dissappear ?

**USMCNJ** · 10-05-2004, 10:46

Originally Posted by LittleGrizzly

look i realise it works one way but the point is it does not work the other

they each paid 9 pound each, 3 of them making 27 pound with a 2 pound tip for the honest shop keeper that makes 29 pounds. how does the pound dissappear ?

i don't get it. they each paid 9. that's 27
25 for the TV and 2 for the tip. why are you adding the 2 to 27?

**English assassin** · 10-05-2004, 10:55

look i realise it works one way but the point is it does not work the other

they each paid 9 pound each, 3 of them making 27 pound with a 2 pound tip for the honest shop keeper that makes 29 pounds. how does the pound disappear ?

Because you double count the two pounds that way. A pound has to be in the till for the TV, in the mens pockets as change, or in the shopkeepers pocket as a tip, right?

When you say they paid £27, that is £25 in the till plus £2 in the shopkeepers pocket. You can't then go on to say that £27 plus the £2 pound tip makes £29, because you've counted the same tip money twice. (and the change not at all)