Author Topic: Maths question  (Read 1013 times)

pat

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Maths question
« on: December 02, 2020, 06:16:54 AM »
This was posted on Facebook - people who attempted it posted many different answers. Some even helpfully explained in detail how they arrived at their (incorrect) answer.

If you want to post your answer, don't give any clues as to how you solved it. It's not a trick question.

whisky

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Re: Maths question
« Reply #1 on: December 02, 2020, 06:42:01 AM »
The answer is 15.

There are 2 parts to the exercise.

1
Careful observation of the actual question.

2
An understanding of fundamental arithmetic and the order of operators ( often called BODMAS ).

Michael

pat

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Re: Maths question
« Reply #2 on: December 02, 2020, 07:02:40 AM »
No clues!

Ozzyjack

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Re: Maths question
« Reply #3 on: December 02, 2020, 08:31:09 AM »
25

oops, I failed observation. But I have now been corrected by one who notices all my mistakes. ;D

I now agree with Michael - 15.

« Last Edit: December 02, 2020, 09:22:25 AM by Ozzyjack »
Cheers, Jack


Not every puzzle is intended to be solved. Some are in place to test your limits. Others are, in fact, not puzzles at all... ― Vera Nazarian, The Perpetual Calendar of Inspiration  

les303

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Re: Maths question
« Reply #4 on: December 02, 2020, 08:33:58 AM »
1 also came up with 25

TRex

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Re: Maths question
« Reply #5 on: December 02, 2020, 08:53:49 AM »
It depends on which order of operations one uses!

les303

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Re: Maths question
« Reply #6 on: December 02, 2020, 09:28:25 AM »
I've had another look, put on my glasses & got closer to the screen.
It seems so obvious now.
Well done Michael.

mkenuk

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Re: Maths question
« Reply #7 on: December 02, 2020, 11:15:37 AM »
It depends on which order of operations one uses!

There is only one order of operations used in arithmetic, that is bodmas.
In the final line of the problem, the multiplication has to be done before the addition.

whisky

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Re: Maths question
« Reply #8 on: December 02, 2020, 11:19:32 AM »
Jack.
Speaking of Pi

Did you hear about the explosion at the Pie Factory ?
It was so loud, it could be heard from 3.141 miles away.

Michael

TRex

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Re: Maths question
« Reply #9 on: December 02, 2020, 11:48:02 AM »
There is only one order of operations used in arithmetic, that is bodmas.
In the final line of the problem, the multiplication has to be done before the addition.

Ah, but if the problem is done with a calculator .... !

Calilasseia

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Re: Maths question
« Reply #10 on: December 02, 2020, 01:05:01 PM »
The answer is 15.

Even though Pat requested us not to post working, I can supply this to anyone who is interested via other means. :)
Remember: if the world's bees disappear, we become extinct with them ...

Began

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Re: Maths question
« Reply #11 on: December 03, 2020, 04:58:04 PM »
Jack.
Speaking of Pi

Did you hear about the explosion at the Pie Factory ?
It was so loud, it could be heard from 3.141 miles away.

Michael

Another pi joke for algebra fans...

Q: what is the volume of a pizza if the radius  is z and the height is a?
A: pizza

Jacki

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Re: Maths question
« Reply #12 on: December 03, 2020, 08:09:36 PM »
Hilarious!

Alan W

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Re: Maths question
« Reply #13 on: December 03, 2020, 08:39:21 PM »
Good one, Began.

And welcome to the forum!
Alan Walker
Creator of Lexigame websites

Dragonman

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Re: Maths question
« Reply #14 on: December 04, 2020, 03:22:42 AM »
I maybe thicker than the milkshake but I make it 70