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Math and logic riddle thread
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ExtraCredit




 
 
    
 

Post Sun, Oct 18 2020, 9:30 pm
Tamari wrote:
You don't have any riddles? I also wanna solve 'em! Not just explain 'em!

Tell me where you pick em up I’ll go search. I only have the kind of riddles my kids ask me. Let me think if there’s anything above elementary level.
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Post Sun, Oct 18 2020, 9:37 pm
Ok got one but I believe too easy for the geniuses around here.
2+2 is the same as 2x2
Can you find 3 numbers to work with that will equal the same with the same 2 equations? The 3 numbers don’t have to be the same and can have any amount of digits.
I’ll give you one, you give me another 0+0+0=0
0x0x0=0
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Tamari




 
 
    
 

Post Sun, Oct 18 2020, 9:44 pm
ExtraCredit wrote:
Ok got one but I believe too easy for the geniuses around here.
2+2 is the same as 2x2
Can you find 3 numbers to work with that will equal the same with the same 2 equations? The 3 numbers don’t have to be the same and can have any amount of digits.
I’ll give you one, you give me another 0+0+0=0
0x0x0=0


Hidden: 

1+2+3 = 1*2*3 I don't think anything higher can possibly work...
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ExtraCredit




 
 
    
 

Post Sun, Oct 18 2020, 9:46 pm
Tamari wrote:
Hidden: 

1+2+3 = 1*2*3 I don't think anything higher can possibly work...

Good. No explanation needed. Now you give me one Laugh
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Tamari




 
 
    
 

Post Sun, Oct 18 2020, 9:46 pm
What is the maximum amount of numbers you can take from 1 thru 100 so that none should be divisible by another?
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ExtraCredit




 
 
    
 

Post Sun, Oct 18 2020, 9:56 pm
Tamari wrote:
What is the maximum amount of numbers you can take from 1 thru 100 so that none should be divisible by another?

Hidden: 

From 51 through 100?
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Tamari




 
 
    
 

Post Sun, Oct 18 2020, 9:59 pm
ExtraCredit wrote:
Hidden: 

From 51 through 100?


You like this level better?
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ExtraCredit




 
 
    
 

Post Sun, Oct 18 2020, 10:00 pm
Tamari wrote:
You like this level better?

After such a stressful day here, yea. Also I almost pulled out a pen and paper. But then noticed it’s a chap...
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ExtraCredit




 
 
    
 

Post Mon, Oct 19 2020, 12:04 am
Reminded myself of another brilliant one my DD asked me Shabbos:
Imagine you get locked into a room with a hungry lion. All walls are soundproof. The soundproof door is locked from the other side and you have no key. What should you do???
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ChanieMommy




 
 
    
 

Post Mon, Oct 19 2020, 4:33 am
ExtraCredit wrote:
Reminded myself of another brilliant one my DD asked me Shabbos:
Imagine you get locked into a room with a hungry lion. All walls are soundproof. The soundproof door is locked from the other side and you have no key. What should you do???

Hidden: 


Go out through the non soundproof door?
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ExtraCredit




 
 
    
 

Post Mon, Oct 19 2020, 1:19 pm
Nope just one door.
But please keep in mind this is elementary level. Don’t want you to overwork!
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tothepoint




 
 
    
 

Post Mon, Oct 19 2020, 2:01 pm
Ok we need a hint already
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ExtraCredit




 
 
    
 

Post Mon, Oct 19 2020, 2:05 pm
I’ll give you the answer.
Drumroll.....
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ExtraCredit




 
 
    
 

Post Mon, Oct 19 2020, 2:07 pm
ExtraCredit wrote:
Reminded myself of another brilliant one my DD asked me Shabbos:
Imagine you get locked into a room with a hungry lion. All walls are soundproof. The soundproof door is locked from the other side and you have no key. What should you do???

Hidden: 


Just stop imagining!
Sorry Hiding
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tothepoint




 
 
    
 

Post Mon, Oct 19 2020, 2:25 pm
ExtraCredit wrote:
Hidden: 


Just stop imagining!
Sorry Hiding


Oy!
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ChanieMommy




 
 
    
 

Post Tue, Oct 20 2020, 2:19 pm
ExtraCredit wrote:
Hidden: 


Just stop imagining!
Sorry Hiding


LOL LOL LOL LOL LOL LOL LOL LOL LOL LOL LOL LOL LOL LOL
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ExtraCredit




 
 
    
 

Post Tue, Oct 20 2020, 2:20 pm
Ready for a new one. A bit harder than mine.
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Tamari




 
 
    
 

Post Tue, Oct 20 2020, 3:17 pm
Still on elementary level:

Jack is looking at Anne, but Anne is looking at George. Jack is married, but George is not. Is a married person looking at an unmarried person?

Yes
No
Cannot be determined
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Tamari




 
 
    
 

Post Tue, Oct 20 2020, 3:21 pm
There are 4 cards in front of you, with the characters B, 6, A and 7 - one on each.
"“If there is a vowel written on one side of a card, then there is an even number written on the other side.”
How many of these four cards do you need to flip in order to check the validity of this statement?
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ChanieMommy




 
 
    
 

Post Tue, Oct 20 2020, 3:30 pm
Tamari wrote:
Still on elementary level:

Jack is looking at Anne, but Anne is looking at George. Jack is married, but George is not. Is a married person looking at an unmarried person?

Yes
No
Cannot be determined


Hidden: 

Yes. If Anne is married, since she is looking at George, a married person is looking at an unmarried person.
If Anne is unmarried, since Jack is looking at her, a married person is looking at an unmarried person.

So whether Anne is married or not, a married person is looking at an unmarried person...
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