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InvisibleDividedQuantumM
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Re: mathematical brain teaser thread [Re: DieCommie]
    #22649898 - 12/13/15 12:35 PM (8 years, 1 month ago)

Correct!

:mushroom2::mushroom2::mushroom2:


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InvisibleDividedQuantumM
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Re: mathematical brain teaser thread [Re: DividedQuantum]
    #22662450 - 12/16/15 10:05 AM (8 years, 1 month ago)

PROBLEM 39


Quote:

Determine whether each of the following ten statements is true or false.  (1)  Exactly one statement in this list is false.  (2)  Exactly two statements in this list are false.  (3)  Exactly three statements in this list are false. (4)  Exactly four statements in this list are false. (5)  Exactly five statements in this list are false. (6)  Exactly six statements in this list are false. (7)  Exactly seven statements in this list are false. (8)  Exactly eight statements in this list are false. (9)  Exactly nine statements in this list are false. (10)  Exactly ten statements in this list are false.




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Offlinedeff
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Re: mathematical brain teaser thread [Re: DividedQuantum] * 1
    #22662494 - 12/16/15 10:23 AM (8 years, 1 month ago)

1 - false
2 - false
3 - false
4 - false
5 - false
6 - false
7 - false
8 - false
9 - true
10 - false


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InvisibleDividedQuantumM
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Re: mathematical brain teaser thread [Re: deff]
    #22662597 - 12/16/15 10:56 AM (8 years, 1 month ago)

Correct!

:mushroom2::mushroom2::mushroom2:


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Vi Veri Universum Vivus Vici


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InvisibleDividedQuantumM
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Re: mathematical brain teaser thread [Re: DividedQuantum]
    #22662612 - 12/16/15 11:02 AM (8 years, 1 month ago)

PROBLEM 40


Quote:

A number's persistence is the number of steps required to reduce it to a single digit by multiplying all its digits to obtain a second number, then multiplying all the digits of that number to obtain a third number, and so on until a one-digit number is obtained.  For example, 77 has a persistence of four because four steps are required to reduce it to one digit:  77 --> 49 --> 36 --> 18 --> 8.  The smallest number of persistence one is 10, the smallest of persistence two is 25, the smallest of persistence three is 39, and the smallest of persistence four is 77.  What is the smallest number of persistence five?




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InvisibleSun King
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Re: mathematical brain teaser thread [Re: DividedQuantum] * 1
    #22698759 - 12/25/15 03:39 PM (8 years, 1 month ago)

679


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InvisibleDividedQuantumM
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Re: mathematical brain teaser thread [Re: Sun King]
    #22699023 - 12/25/15 05:05 PM (8 years, 1 month ago)

Correct!

:mushroom2::mushroom2::mushroom2:


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