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Math and logic riddle thread
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:19 pm
doodlesmom wrote:
Hidden: 


5.45454545455


Per my calculator


That’s how many minutes. But remember that there are only 60 seconds in a minute.
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 6:20 pm
malki2 wrote:
Yes! πŸŽ‰πŸŽ‰πŸ‘πŸ‘πŸ‘

Even though I did not solve it like that!


I think this off by a factor of 5 or so

Because the result you obtain would be between 5 and 6 pm...and we agreed it wbetween 1:05 and 1:06 pm...
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:24 pm
ChanieMommy wrote:
I think this off by a factor of 5...


No, the answer is 1:05 and 27 seconds and 45 hundredths.
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 6:28 pm
malki2 wrote:
No, the answer is 1:05 and 27 seconds and 45 hundredths.


No,
Hidden: 

1:05:27,27
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:30 pm
Algebraically, you can solve it like this:

Starting from noon, both hands travel different distances at different rates, but for the same amount of time. D=R*T, so T=D/R. Since the times are equal (because they will meet at that time) so D/R (hour hand) = D/R (min. hand).
D (hour hand)= X
D (min. hand)= 60+X
R (hour hand)= 5/hour
R (min hand)= 60/hour

so, X/5 = (60+X)/60
and 60X = 300 + 5X
and X = 300/55 = 5.4545 minutes =5 minutes, 27.45 seconds
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:32 pm
ChanieMommy wrote:
No,
Hidden: 

1:05:27,27


No because it is .45 of a minute, and .45 of a second. The seconds are divided into 100, not 60.
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 6:36 pm
malki2 wrote:
Algebraically, you can solve it like this:

Starting from noon, both hands travel different distances at different rates, but for the same amount of time. D=R*T, so T=D/R. Since the times are equal (because they will meet at that time) so D/R (hour hand) = D/R (min. hand).
D (hour hand)= X
D (min. hand)= 60+X
R (hour hand)= 5/hour
R (min hand)= 60/hour

so, X/5 = (60+X)/60
and 60X = 300 + 5X
and X = 300/55 = 5.4545 minutes =5 minutes, 27.45 seconds


In your last line, there is conversion error...

5.45454545 minutes is not 5 min 27.45 seconds, but 5 minutes 27.27 seconds
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 6:38 pm
I feel like Hillel stuck in the snow looking in through the skylight how 2 giants in math are arguing.
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:40 pm
ChanieMommy wrote:
Inyour last line, there is conversion error...

5.45454545 minutes is not 5 min 27,45 seconds, but 5 minutes 27.27 seconds


You are correct. Conversion error.
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  doodlesmom  




 
 
    
 

Post Tue, Oct 13 2020, 6:46 pm
I told you I need help with the math....I do the logic...
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:47 pm
doodlesmom wrote:
I told you I need help with the math....I do the logic...


Good logic
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  doodlesmom  




 
 
    
 

Post Tue, Oct 13 2020, 6:59 pm
What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:03 pm
doodlesmom wrote:
What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?

Hidden: 

13112221
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:04 pm
Finally one I can solve today. Or maybe the second.
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  doodlesmom  




 
 
    
 

Post Tue, Oct 13 2020, 7:04 pm
ExtraCredit wrote:
Hidden: 

13112221


Yay!
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  shanie5  




 
 
    
 

Post Tue, Oct 13 2020, 7:16 pm
doodlesmom wrote:
What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?


Hidden: 

13112221
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  Tamari  




 
 
    
 

Post Tue, Oct 13 2020, 7:20 pm
Is there no in-between here? Either ultra challenging, or fifth-grade level?
C'mon!!! Lemme have something GOOD!
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 7:22 pm
doodlesmom wrote:
What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?


Iwould say:
Hidden: 

13112221
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  tothepoint  




 
 
    
 

Post Tue, Oct 13 2020, 7:41 pm
doodlesmom wrote:
What is next in this sequence of numbers: 1, 11, 21, 1211, 111221, 312211, ______?


Hidden: 

13112221
Cute!
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  doodlesmom  




 
 
    
 

Post Tue, Oct 13 2020, 7:42 pm
123=0
4235=0
656=2
5390=2
8890=6
1001=2
19235=1
What is 123456789?
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