Techtech
Thu Aug 1, 2019, 10:42 AM
def_con5 (13,162 posts)
8¿2(2+2) ?
Here's an explanation.
https://www.foxnews.com/tech/viral-math-problem-baffles-many-internet Edit to add. The ? is a division symbol.
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5 replies, 242 views
Always highlight: 10 newest replies | Replies posted after I mark a forum
Replies to this discussion thread
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Author | Time | Post |
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def_con5 | Aug 2019 | OP |
Cold Warrior | Aug 2019 | #1 | |
fools_gold | Aug 2019 | #2 | |
Cold Warrior | Aug 2019 | #3 | |
fools_gold | Aug 2019 | #4 | |
rampartb | Aug 2019 | #5 |
Response to def_con5 (Original post)
Thu Aug 1, 2019, 11:46 AM
Cold Warrior (14,115 posts)
1. Say what?
First the guy explaining the PEDMAS method changes 2+2 to 2X2. Yes these are the same but what mathematician would do that? Then he says...
8÷2(2x2) = 8÷2(4) = 8÷8 = 1 = Answer is 1 2 raised to the fourth is 16, not 8. WTF are these people talking about??? |
Response to Cold Warrior (Reply #1)
Thu Aug 1, 2019, 12:20 PM
fools_gold (7,441 posts)
2. Where do you see am exponential?
I see no 2 raised to the fourth power.
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Response to fools_gold (Reply #2)
Thu Aug 1, 2019, 12:23 PM
Cold Warrior (14,115 posts)
3. 2(2+2)
How would you interpret that?
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Response to Cold Warrior (Reply #3)
Thu Aug 1, 2019, 12:34 PM
fools_gold (7,441 posts)
4. two times the separate operation of two plus two, or 8.
In my 50+ years of engineering mathematical notations, before we had easily available subscripts and superscripts, we would use the ^ "carot" figure, or sometimes (e) or (*), such as
2^(2+2) or 2(*)(2+2) or 2 (e) (2+2) A number abutted right up to another operation is always a straight multiplication. That's the way we have always done it. |
Response to Cold Warrior (Reply #3)
Thu Aug 1, 2019, 01:05 PM
rampartb (18,941 posts)
5. distributive property
add the internal 2s then multiply by 2.
I know that the parentheses is in the denominator and i'm sure that any machine running fortran or basic would solve this : 8 / 2(2+2) = 8 / 2(4) = 8/ 8 = 1 but I can't put my finger on a rule. pedmas does indeed return a 16, but I think that might require an explicit * rather than that distributive property. |