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Atheist Forums › Science › Mathematics v
Fun Mathy Type Riddles

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Fun Mathy Type Riddles
BrianSoddingBoru4 Offline
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#101
RE: Fun Mathy Type Riddles
October 25, 2017 at 3:37 am
Consider it lagniappe. Smile

Boru
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SaStrike Offline
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#102
RE: Fun Mathy Type Riddles
November 4, 2017 at 8:26 pm (This post was last modified: November 4, 2017 at 8:43 pm by SaStrike.)
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GrandizerII Offline
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#103
RE: Fun Mathy Type Riddles
November 14, 2017 at 11:47 am (This post was last modified: November 14, 2017 at 11:53 am by GrandizerII.)
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GrandizerII Offline
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#104
RE: Fun Mathy Type Riddles
November 14, 2017 at 5:00 pm
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Whateverist Away Donators
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#105
RE: Fun Mathy Type Riddles
November 14, 2017 at 5:26 pm (This post was last modified: November 14, 2017 at 5:27 pm by Whateverist.)
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Haipule Offline
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#106
RE: Fun Mathy Type Riddles
November 14, 2017 at 6:26 pm (This post was last modified: November 14, 2017 at 7:24 pm by Haipule.)
(October 22, 2017 at 5:39 pm)BrianSoddingBoru4 Wrote: I came across one that may prove a right old poser:

It is a commonly accepted, but erroneous, belief that 7 x 13 = 91.  In fact, 7 x 13 = 28.  The can be checked by demonstrating that 28 / 7 = 13, and by showing that 13+13+13+13+13+13+13 = 28.

Hint:  Colgate Toothpaste

After a reasonable time for those who wish to have a go have had one, I'll post the solution.


Boru
In vortex math there is no zero and no number higher than 9. Therefore, since 13 is higher than 9, it is reduced to 1 + 3 = 4. Therefore, 7 x 4 = 28 However, 28 is higher than 9 and is reduced to 2 + 8 = 10 which is also higher than 9 and reduced to 1 + 0 = 1. Conclusion: 7 x 13 = 1 or, shortcut 7 x 13 = 91 where 9 + 1 = 10 reduced to 1 + 0 = 1
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GrandizerII Offline
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#107
RE: Fun Mathy Type Riddles
November 14, 2017 at 7:31 pm
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BrianSoddingBoru4 Offline
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#108
RE: Fun Mathy Type Riddles
November 15, 2017 at 4:26 am (This post was last modified: November 15, 2017 at 4:27 am by BrianSoddingBoru4.)
Quote:You sure you're not mistaking the number 13 for the number 4?

Quite sure.

Boru
(November 14, 2017 at 6:26 pm)Haipule Wrote:
(October 22, 2017 at 5:39 pm)BrianSoddingBoru4 Wrote: I came across one that may prove a right old poser:

It is a commonly accepted, but erroneous, belief that 7 x 13 = 91.  In fact, 7 x 13 = 28.  The can be checked by demonstrating that 28 / 7 = 13, and by showing that 13+13+13+13+13+13+13 = 28.

Hint:  Colgate Toothpaste

After a reasonable time for those who wish to have a go have had one, I'll post the solution.


Boru
In vortex math there is no zero and no number higher than 9. Therefore, since 13 is higher than 9, it is reduced to 1 + 3 = 4. Therefore, 7 x 4 = 28 However, 28 is higher than 9 and is reduced to 2 + 8 = 10 which is also higher than 9 and reduced to 1 + 0 = 1. Conclusion: 7 x 13 = 1 or, shortcut 7 x 13 = 91 where 9 + 1 = 10 reduced to 1 + 0 = 1


Wrong.

Boru
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Fireball Offline
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#109
RE: Fun Mathy Type Riddles
November 15, 2017 at 11:58 am
(November 14, 2017 at 6:26 pm)Haipule Wrote:
(October 22, 2017 at 5:39 pm)BrianSoddingBoru4 Wrote: I came across one that may prove a right old poser:

It is a commonly accepted, but erroneous, belief that 7 x 13 = 91.  In fact, 7 x 13 = 28.  The can be checked by demonstrating that 28 / 7 = 13, and by showing that 13+13+13+13+13+13+13 = 28.

Hint:  Colgate Toothpaste

After a reasonable time for those who wish to have a go have had one, I'll post the solution.


Boru
In vortex math there is no zero and no number higher than 9. Therefore, since 13 is higher than 9, it is reduced to 1 + 3 = 4. Therefore, 7 x 4 = 28 However, 28 is higher than 9 and is reduced to 2 + 8 = 10 which is also higher than 9 and reduced to 1 + 0 = 1. Conclusion: 7 x 13 = 1 or, shortcut 7 x 13 = 91 where 9 + 1 = 10 reduced to 1 + 0 = 1

Vortex math? That's the bastard spawn of the Time Cube and a jellyfish.
If you get to thinking you’re a person of some influence, try ordering somebody else’s dog around.
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Haipule Offline
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#110
RE: Fun Mathy Type Riddles
November 15, 2017 at 2:48 pm
(November 15, 2017 at 11:58 am)Fireball Wrote:
(November 14, 2017 at 6:26 pm)Haipule Wrote: In vortex math there is no zero and no number higher than 9. Therefore, since 13 is higher than 9, it is reduced to 1 + 3 = 4. Therefore, 7 x 4 = 28 However, 28 is higher than 9 and is reduced to 2 + 8 = 10 which is also higher than 9 and reduced to 1 + 0 = 1. Conclusion: 7 x 13 = 1 or, shortcut 7 x 13 = 91 where 9 + 1 = 10 reduced to 1 + 0 = 1

Vortex math? That's the bastard spawn of the Time Cube and a jellyfish.
It is a fun brain toy. However if you include the pluses and minuses of electronic circuitry, then vortex math will make your head spin Smile
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Fun Mathy Type Riddles

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