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Maths magic......of factorials

  1. Chandan Baranwal
    Chandan Baranwal
    A factorion is a natural number that equals the sum of the factorials of its decimal digits. For example, 145 is a factorion because


    1! + 4! + 5!
    = 1 + 24 + 120
    = 145.


    There are just four factorions (in base 10) and they are 1, 2, 145 and 40585 (rare property)


    1 = 1!
    2 = 2!
    145 = 1! + 4! + 5!
    40585 = 4! + 0! + 5! + 8! + 5!
  2. sreekanthzipsy
    sreekanthzipsy
    where do u get all these.........awesome tricks......
  3. Chandan Baranwal
    Chandan Baranwal
    Join this Facebook group for more trick n mind storming question...

    https://www.facebook.com/groups/3262...rofl)::(rofl):
  4. sreekanthzipsy
    sreekanthzipsy
    thank u @chandan baranwal ...........
  5. user_000
    user_000
    Let us have some more cycles

    8! + 7! + 2! = 45362
    4! + 5! + 3! + 6! + 2! = 872

    8! + 7! + 1! = 45361
    4! + 5! + 3! + 6! + 1! = 871

    These are 2 cycle wonders ...

    Consider 169

    1! + 6! + 9! = 363601
    3! + 6! + 3! + 6! + 0! + 1! = 1454
    1! + 4! + 5! + 4! = 169

    It should be noted that this works for no other number less than 2 million.

    REF: Math Wonders to inspire Teachers and Students by Dr. Alfred S Posamentier
  6. malini
    malini
    Amazing.....!!!!
  7. apoorva123456
    apoorva123456
    hmmm......thats cooolll
  8. ahayat
    ahayat
    what are superfactorials??
  9. ahayat
    ahayat
    13! surpasses the number of seconds in a century!
  10. Midhunasri
    Midhunasri
    Super!!!!!!!!!!! may I know Some Problems Regarding MAths
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