xamdam

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About xamdam

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  1. xamdam added a post in a topic How many would it be?   

    I get


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  2. xamdam added a post in a topic   


    Hey, not bad guppy! Welcome to the Den.
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  3. xamdam added a post in a topic   




    I got this too. I liked those triangular numbers. http://en.wikipedia....iangular_number
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  4. xamdam added a post in a topic   

  5. xamdam added a post in a topic   


    Yep, I got that too.
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  6. xamdam added a topic in New Logic/Math Puzzles   

    Suppose we call the sum of the digits of the sum of the digits of a whole number its "sodsod. "

    For example, the sodsod of 48 is 3 (4+8 = 12; 1+2 = 3).

    Now, consider all the four-digit whole numbers:



    1) What's the maximum sodsod?

    a) Prove it's the maximum (without listing all of them).

    2) How many four-digit whole numbers have this maximum sodsod?

    a) How many (four-digit numbers with the maximum sodsod) have a 1 in the thousands column?

    b) How many have a 2 in the thousands column?

    c) a 3?

    d a 4?

    e) a 5?

    f) a 6?

    g) a 7?

    h) an 8?

    i) a 9?

    j) Any patterns in a-i above?
    • 14 replies
    • 552 views
  7. xamdam added a post in a topic   


    Well done k-man
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  8. xamdam added a post in a topic   

  9. xamdam added a post in a topic   



    Is this an anagram?
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  10. xamdam added a post in a topic   


    Very good -- you used radians, standard notation (and combining digits) to get DUH. I like it.
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  11. xamdam added a post in a topic   

  12. xamdam added a post in a topic   

    Adogg, Drexlin, Third: Hmmm, I didn't get any of those solutions.


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  13. xamdam added a topic in New Logic/Math Puzzles   

    14, 10, 8, 9, 52, 7

    1) solve the code,

    2) answer the problem posed,

    3) find the 3rd, 6th, 7th, 10th and 12th digits of the solution to that problem,

    4) change each of these digits to a letter of the alphabet,

    5) look this word up in Wikipedia, the free encyclopedia,

    6) click on Polski,

    7) find the sum of the letters of the resulting word,

    8) put your solution in a spoiler, but don’t give method or clues yet.


    • 18 replies
    • 712 views
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