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Math and logic riddle thread
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  malki2  




 
 
    
 

Post Wed, Sep 16 2020, 9:42 pm
tothepoint wrote:
https://I.imgur.com/cF2wrbe.jpg


Sorry to throw a wrench in your riddle, but I just noticed that the man in the other rows is wearing black shoes. The man in the bottom row is wearing the fat brown shoes. But not the black shoes. So you really don’t know the value of the man wearing the brown shoes but minus the black shoes. So the riddle is actually unsolvable. Tongue Out
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mamma llama  




 
 
    
 

Post Wed, Sep 16 2020, 9:47 pm
.

Last edited by mamma llama on Wed, Sep 16 2020, 9:53 pm; edited 1 time in total
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  mamma llama  




 
 
    
 

Post Wed, Sep 16 2020, 9:48 pm
malki2 wrote:
Sorry to throw a wrench in your riddle, but I just noticed that the man in the other rows is wearing black shoes. The man in the bottom row is wearing the fat brown shoes. But not the black shoes. So you really don’t know the value of the man wearing the brown shoes but minus the black shoes. So the riddle is actually unsolvable. Tongue Out


Maybe he's wearing the brown shoes OVER the black ones! Laugh
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  mamma llama  




 
 
    
 

Post Wed, Sep 16 2020, 9:52 pm
How do you go from 98 to 720 using only one letter?
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  ExtraCredit  




 
 
    
 

Post Wed, Sep 16 2020, 10:44 pm
tothepoint wrote:
Try again Tongue Out

I was sure I didn’t miss anything. Let me try again.
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  ExtraCredit  




 
 
    
 

Post Wed, Sep 16 2020, 10:46 pm
Wait why are people posting answers without hiding content? Now I see I missed the multiplication sign.
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  ExtraCredit  




 
 
    
 

Post Wed, Sep 16 2020, 10:50 pm
tothepoint wrote:
You have 9 marbles all weighing the same but one. Can you find out which marble weighs more by using a balancing scale twice?


Hidden: 

You do 3&3 to find out in which pile of 3 it is. If both are same it’s in the 3 not on scale. Then do 1&1. Whichever weighs less is the one and if both the same it’s the 1 spare Very Happy
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  ExtraCredit  




 
 
    
 

Post Wed, Sep 16 2020, 10:52 pm
mamma llama wrote:
How do you go from 98 to 720 using only one letter?


Hidden: 

If u add an x between 9&8 you get 72. Ur sure it’s 720?
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  ExtraCredit  




 
 
    
 

Post Wed, Sep 16 2020, 10:54 pm
malki2 wrote:
Sorry to throw a wrench in your riddle, but I just noticed that the man in the other rows is wearing black shoes. The man in the bottom row is wearing the fat brown shoes. But not the black shoes. So you really don’t know the value of the man wearing the brown shoes but minus the black shoes. So the riddle is actually unsolvable. Tongue Out

It’s galoshes worn over regular shoes. Wink
Don’t throw wrenches here.
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  ExtraCredit  




 
 
    
 

Post Wed, Sep 16 2020, 10:57 pm
pause wrote:
Couldn't control myself from posting one more:

A train from NY to Atlanta takes 12 hours. Trains leave NY bound for Atlanta and also leave Atlanta bound for NY - every hour on the hour. If a person gets onto the noon train in NY heading towards Atlanta, in the 12 hours that he will be sitting on the train until his midnight arrival, how many NY-bound trains will he pass?


Hidden: 

13? I’m really tired I believe it’s wrong.
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  mamma llama  




 
 
    
 

Post Thu, Sep 17 2020, 12:12 am
ExtraCredit wrote:
Hidden: 

If u add an x between 9&8 you get 72. Ur sure it’s 720?


Nope, I mean 720! Shame on you
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  ChanieMommy  




 
 
    
 

Post Thu, Sep 17 2020, 4:02 am
malki2 wrote:
The riddle was formulated correctly (when it was explained that the switches are on the outside). I was clapping for the person who got the solution.

I don't know. If there are no other limitations, I try the first button, go in, if the light is on, I stay, if it is not on, I go out again and try the second bottom and go in again. If the light is on now, I stay, if it is still not on, I push the third bottom.
Problem solved.

so where does the solution come in?

There have to be limitations that were not properly formulated.
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  ChanieMommy  




 
 
    
 

Post Thu, Sep 17 2020, 4:07 am
pause wrote:
Here's the answer to the light bulb one:
Hidden: 

Turn the first switch on and leave it on for 10 minutes. Then turn it off. Then turn on the second switch and enter the room. If the light is now on - you know it's the second switch. If the light is off, feel the bulb. If it's warm - you know it's the first switch. If none of the above - you know it's the third (untouched) switch.


But who said the number of comings and goings into the room and out of the room was limited?
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  malki2  




 
 
    
 

Post Thu, Sep 17 2020, 5:32 am
mamma llama wrote:
How do you go from 98 to 720 using only one letter?


Hidden: 

ninety x eight
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  pause  




 
 
    
 

Post Thu, Sep 17 2020, 5:57 am
ChanieMommy wrote:
But who said the number of comings and goings into the room and out of the room was limited?

You're right. She didn't mention that limitation.
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  pause  




 
 
    
 

Post Thu, Sep 17 2020, 5:58 am
malki2 wrote:
Hidden: 

ninety x eight

That's two letters - a 0 and an x
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  ExtraCredit  




 
 
    
 

Post Thu, Sep 17 2020, 5:58 am
ChanieMommy wrote:
I don't know. If there are no other limitations, I try the first button, go in, if the light is on, I stay, if it is not on, I go out again and try the second bottom and go in again. If the light is on now, I stay, if it is still not on, I push the third bottom.
Problem solved.

so where does the solution come in?

There have to be limitations that were not properly formulated.

Agree
It wasn’t worded clearly enough.
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  pause  




 
 
    
 

Post Thu, Sep 17 2020, 5:58 am
ExtraCredit wrote:
Hidden: 

13? I’m really tired I believe it’s wrong.

Wrong. But why 13? Most people say 12.
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  ExtraCredit  




 
 
    
 

Post Thu, Sep 17 2020, 5:59 am
pause wrote:
Wrong. But why 13? Most people say 12.

The first second and last adds 1 to 12...
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  malki2  




 
 
    
 

Post Thu, Sep 17 2020, 6:59 am
pause wrote:
That's two letters - a 0 and an x


No it’s not. I multiplied using textual representation of the numbers.
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