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experimentX

  • 3 years ago

What's this supposed to mean We shall say that an n-digit number is pandigital if it makes use of all the digits 1 to n exactly once; for example, the 5-digit number, 15234, is 1 through 5 pandigital. The product 7254 is unusual, as the identity, 39x186 = 7254, containing multiplicand, multiplier, and product is 1 through 9 pandigital. Find the sum of all products whose multiplicand/multiplier/product identity can be written as a 1 through 9 pandigital. HINT: Some products can be obtained in more than one way so be sure to only include it once in your sum.

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  1. experimentX
    • 3 years ago
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    the list seems to be 12 483 5796 18 297 5346 42 138 5796 27 198 5346 28 157 4396 39 186 7254 48 159 7632 2 1793 3586 2 4178 8356 2 4358 8716 2 3459 6918 2 3479 6958 2 4659 9318 2 4569 9138 2 4769 9538 2 4679 9358 3 1942 5826 3 2615 7845 3 1625 4875 3 2915 8745 3 2618 7854 3 2918 8754 3 1928 5784 3 1594 4782 4 1732 6928 4 1593 6372 4 1963 7852 4 1738 6952 4 1958 7832 4 2379 9516 6 1432 8592 6 1572 9432 6 1573 9438 7 1235 8645 7 1364 9548

  2. experimentX
    • 3 years ago
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    the sum of unique product seems to be 247882

  3. experimentX
    • 3 years ago
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    am i missing something?

  4. cwrw238
    • 3 years ago
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    well there are no examples where multiplier is 8 or 9

  5. experimentX
    • 3 years ago
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    I tried all ... couldn't find one.

  6. experimentX
    • 3 years ago
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    What's this supposed to mean "Find the sum of all products whose multiplicand/multiplier/product identity can be written as a 1 through 9 pandigita"

  7. azka.niazi
    • 3 years ago
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    was the list already provided?

  8. sauravshakya
    • 3 years ago
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    I think it means to add 5796+5346+5796+...

  9. sauravshakya
    • 3 years ago
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    And I dont think all the listed numbers are correct

  10. experimentX
    • 3 years ago
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    the list was not provided. I wrote a program to compute the list.

  11. experimentX
    • 3 years ago
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    i added up unique values 5796+5346+5796+... = 247882

  12. experimentX
    • 3 years ago
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    http://projecteuler.net/problem=32

  13. azka.niazi
    • 3 years ago
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    if the list was already provided, then all you need to you to need first find those number whose multiplicand/multiplier/product identity can be written as a 1 through 9 pandigita. For example 12*483=5796 is a 1 through 9 pandigita (because you can find all digit 1 to 9 in that). But another entry in the list 2*1793=3586 is not a 1 through 9 pandigita (there is no 4). So filter out the 1 through 9 pandigita first. And then sum them up.

  14. azka.niazi
    • 3 years ago
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    oh i see. but the list isn't correct. there are entries which can't be called a 1 through 9 pandigita - i think!

  15. experimentX
    • 3 years ago
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    *pandigital looks like it i didn't check it manually.

  16. experimentX
    • 3 years ago
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    looks like in need to edit my program.

  17. azka.niazi
    • 3 years ago
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    oh right! "pandigital"...i copied the word! =)

  18. azka.niazi
    • 3 years ago
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    yes, you do!

  19. experimentX
    • 3 years ago
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    this looks final 12 483 5796 18 297 5346 42 138 5796 27 198 5346 28 157 4396 39 186 7254 48 159 7632 4 1963 7852 4 1738 6952 -------------------------- sum = 45228

  20. experimentX
    • 3 years ago
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    Bingo!! help each other's with medals!!

  21. azka.niazi
    • 3 years ago
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    lol! finally!! yeah, that seems right!

  22. sauravshakya
    • 3 years ago
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    @experimentX u use which programming language to write progrmas

  23. experimentX
    • 3 years ago
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    nowdays i'm using matlab + mathematica ... I'm planning to learn python. besides that i know bunch of other languges.

  24. experimentX
    • 3 years ago
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    better learn python ... it's serves multipurpose.

  25. sauravshakya
    • 3 years ago
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    Oh ya......... I have seen my friends writting program using python.... That looks good.

  26. experimentX
    • 3 years ago
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    once you learn one language ... rest of language have similar structure.

  27. sauravshakya
    • 3 years ago
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    Well i know as u know Q-basic that we learn at school...... and can also use Visual Basic....... But python looks very different.

  28. experimentX
    • 3 years ago
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    once you get your hands on it ... probably programming python is lot faster than those in Basic or VB

  29. sauravshakya
    • 3 years ago
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    Well thanx I will try it.

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