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Math and logic riddle thread
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:10 pm
ExtraCredit wrote:
I don’t chap if this is the answer you’re looking for or something trickier?
Also by the time it’s :05 isn’t the small handle a drop off? Wouldn’t 1:06 or :07 work better?


Well the hours hand only moves five minutes every hour. So it can’t get that far past the 1.
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 6:13 pm
malki2 wrote:
Well the hours hand only moves five minutes every hour. So it can’t get that far past the 1.

I added my answer previous pg. did I get it?
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 6:17 pm
Let's see, about the two hands of the clock, when they meet again...
Hidden: 

1h (for the small hand) or 5 min (for the big hand) are 30° (360/12 = 30)
so 5 min are (30/12)° =(5/2)° = 2,5° for the hour hand.
6° is one minute (60s) for the minute hand, so 1° is 10s, so 2,5° are 25s...

So this would be 1:05:25

And then I suppose there would be further regression...
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 6:20 pm
Wait probably this
Hidden: 

5 seconds and 83 milliseconds
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 6:24 pm
ChanieMommy wrote:
Let's see, about the two hands of the clock, when they meet again...
Hidden: 

1h (for the small hand) or 5 min (for the big hand) are 30° (360/12 = 30)
so 5 min are (30/12)° =(5/2)° = 2,5° for the hour hand.
6° is one minute (60s) for the minute hand, so 1° is 10s, so 2,5° are 25s...

So this would be 1:05:25

And then I suppose there would be further regression...

Do our answers match up at all?
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 6:31 pm
ExtraCredit wrote:
Do our answers match up at all?


No, not really, but last time they did not match, you were right... (with the 1.5 chickens who laid 1.5 eggs in 1.5 days or so)

How did you compute yours now?
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:54 pm
ExtraCredit wrote:
Wait probably this
Hidden: 

5 seconds and 83 milliseconds


Not even close
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  malki2  




 
 
    
 

Post Tue, Oct 13 2020, 6:56 pm
New rule: when you answer a math problem you need to show your work or give your reasoning.
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:04 pm
ChanieMommy wrote:
No, not really, but last time they did not match, you were right... (with the 1.5 chickens who laid 1.5 eggs in 1.5 days or so)

How did you compute yours now?

I did 1/12th of a second. Hiding
I think I’ll stick to the worst meal thread until I’m better rested. And the ruler’s mind is sharpened. Right now it’s stick glue.
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  Tamari  




 
 
    
 

Post Tue, Oct 13 2020, 7:12 pm
malki2 wrote:
New rule: when you answer a math problem you need to show your work or give your reasoning.


Hidden: 

Answer I got was 1:05 and 5.08 seconds. I have two double-sided sheets with scribbles, cuz I hate calculators, so I warn you if I'm very off......
As for showing work, no-one would understand....
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:14 pm
Tamari wrote:
Hidden: 

Answer I got was 1:05 and 5.08 seconds. I have two double-sided sheets with scribbles, cuz I hate calculators, so I warn you if I'm very off......
As for showing work, no-one would understand....

Had that today with the father and son riddle LOL
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 7:17 pm
ExtraCredit wrote:
I did 1/12th of a second. Hiding
I think I’ll stick to the worst meal thread until I’m better rested. And the ruler’s mind is sharpened. Right now it’s stick glue.


Couldn't you pass me some of the glue?

I just chewed so hard on my pencil that it broke... and I would need some glue to stick the pieces back together...
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:18 pm
ChanieMommy wrote:
Couldn't you pass me some of the glue?

I just chewed so hard on my pencil that it broke... and I would need some glue to stick the pieces back together...

As long as you solved it. It’s worth a pencil.
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  Tamari  




 
 
    
 

Post Tue, Oct 13 2020, 7:23 pm
ExtraCredit wrote:
Had that today with the father and son riddle LOL


Not me. Those numbers were still calculatable, but going with decimals......that's another story.
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:26 pm
No pencils needed here:
How is it possible that a driver of a car is going 60MPH during a downpour and doesn’t need to use his wipers at all?


Last edited by ExtraCredit on Tue, Oct 13 2020, 8:20 pm; edited 1 time in total
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  ExtraCredit  




 
 
    
 

Post Tue, Oct 13 2020, 7:27 pm
Tamari wrote:
Not me. Those numbers were still calculatable, but going with decimals......that's another story.

Once I got the hint it was smooth sailing but before that I tried so many different numbers.
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 7:29 pm
OK, still with the two hands of the clock.

So now we are at
Hidden: 

1:05:25.

5 minutes are 2,5° for the hour handle, so 1 minute would be 0.5°, so 25s would be (1/2)*25/60=5/24°

(5/24)° would be 10*5/24s for the minute handle, that would be 25/12 = 2,083333s

So the time to the 1/100 s would be 1:05:27,08

But wait, I have the solution: they never meet, just as Zenon's the paradoxon with the turtle says...

But fortunately we have the planck length, and Heisenberg's uncertainty principle, so they will meet all the same,

Hidden: 

after 1:05:27,083 and before 1:05:27,084.


Right?
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 7:33 pm
ExtraCredit wrote:
No pencils needed here:
How is it possible that a driver of a car is going 60MPH in a downpour and doesn’t need to use his wipers at all?


Hidden: 

1) he has no windshield

2) there is a 60 mph wind from behind
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  Tamari  




 
 
    
 

Post Tue, Oct 13 2020, 7:43 pm
ExtraCredit wrote:
No pencils needed here:
How is it possible that a driver of a car is going 60MPH in a downpour and doesn’t need to use his wipers at all?


Hidden: 

He may be a drive, but he's currently walking.
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  ChanieMommy  




 
 
    
 

Post Tue, Oct 13 2020, 7:53 pm
Tamari wrote:
Hidden: 

He may be a drive, but he's currently walking.


Hidden: 

Oh, so you are on a car-train? But why would you sit in the car?

And if it's the channel-tunnel, it's a tunnel, so no downpour under the sea...
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