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### Topic: 48÷2(9+3) = ? (Read 10950 times)previous topic - next topic

#### Nick Gammon

#75
##### Apr 24, 2011, 06:48 am
I've got a lot more calculators ...
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

#### retrolefty

#76
##### Apr 24, 2011, 06:53 am

I've got a lot more calculators ...

That's a problem. Man with one watch always knows the time, man with two watches never quite sure. Same with calculators I guess.

#### mowcius

#77
##### Apr 24, 2011, 10:33 am
Quote
My Casio fx-115 gave the answer 4.

What freaky ass maths is that thing doing?

#### westfw

#78
##### Apr 24, 2011, 10:58 am
Quote
Quote
My Casio fx-115 gave the answer 4.

What freaky ass maths is that thing doing?

My brand-new fx260 as well.  I believe this is "open paren wipes out the partially complete number 2...", so you get 48 / (9+3)

#79
haha

#### Nick Gammon

#80
##### Apr 24, 2011, 12:26 pm

What freaky ass maths is that thing doing?

TBH I was hoping no-one would ask me that. I was going to reply "batteries are low".

I can make a video if you don't believe me ...
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

#### mowcius

#81
##### Apr 24, 2011, 12:29 pm

TBH I was hoping no-one would ask me that. I was going to reply "batteries are low".

Haha no I believe you - perhaps westfw's answer is correct to this anyway.

#### Nick Gammon

#82
##### Apr 24, 2011, 12:32 pm
So can the OP modify the poll to allow 4 as an optional answer?
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

#### mowcius

#83
##### Apr 24, 2011, 12:36 pm

So can the OP modify the poll to allow 4 as an optional answer?

We just need a 'none of the above'

#### Nick Gammon

#84
##### Apr 24, 2011, 12:44 pm

• HP SmartCalc 300s: 288

• OS/X calculator: beeps at the bracket, so invalid syntax

• TI-30XB: 288
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

#### Nick Gammon

#85
##### Apr 24, 2011, 12:46 pm
What was I thinking of? I forgot Google!

Google: "48/2(9+3)"

Answer: 288

Well I think that answers it for good!
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

#### Nick Gammon

#86
##### Apr 24, 2011, 12:58 pm
I did an advanced driving course once. They asked us some question, I forget what it was, something about who gives way under a certain circumstance. Half answered X the other half answered Y.

The instructor said "the important thing is not who is right, but that half of you disagree - that is the recipe for a collision".

This is a similar case, the important thing is not so much what the "right" answer is, but the fact that there is disagreement, and one presumes between reasonably educated mathematical-type people. So if we were programming, say, a space shuttle, between us we might make it crash.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

#### mowcius

#87
##### Apr 24, 2011, 02:02 pm
Quote
between us we might make it crash.

Might?

I think that's an understatement - "Look at this code I wrote to make the space shuttle do a backflip!"...

#### raron

#88
##### Apr 24, 2011, 03:35 pm
Just when I started to get sick of this thread, something half interesting shows up!
Quote
A Casio fx-100AU calculator.

48÷2(9+3) = 2

Why didn't I think of that? Casio CFX-9970G agreees. I don't!
However, explicitly keying in the multiplication before the parenthesis yields 288:

48/2*(9+3) = 288

Quote
What was I thinking of? I forgot Google!

Google: "48/2(9+3)"

Answer: 288

Well I think that answers it for good!

Wolfram Alpha agrees

#### mowcius

#89
##### Apr 24, 2011, 03:58 pm
Well, wolfram alpha has misinterpreted the input calculation.

If I put 48?2(9+3) into my calculator I also get 288 but 48÷2(9+3) yields 2

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