Posers and Puzzles

Posers and Puzzles

  1. Joined
    12 Sep '07
    Moves
    2668
    18 Jun '08 07:131 edit
    Many of you may have done something similar before.

    You are given four numbers, and you must use each number exactly once. You may only use multiplication, division, addition and subratction and parentheses. You must come up with expression that equals 24. 'Joining' numbers is not allowed, for example if you had a 1 and a 3, you may not simply join then to make 13, or 31. Exponentials are no allowed. This includes roots and recipricals.

    So the challenge is, make 24 from these sets of numbers
    1 2 3 4
    1 2 3 5
    1 2 3 6
    1 2 4 5
    1 2 4 6
    1 2 5 6
    1 3 4 5
    1 3 4 6
    1 3 5 6
    1 4 5 6
    2 3 4 5
    2 3 4 6
    2 3 5 6
    2 4 5 6
    3 4 5 6

    Out of those, 1346 is by far the most difficult. I'll post the people who have solved each one next to it.

    Banx99, stay away please.
  2. ALG
    Joined
    16 Dec '07
    Moves
    6190
    18 Jun '08 07:1913 edits
    1 x 2 x 3 x 4 = 24
    (1 + 2) x (3 + 5) = 24
    (2 + 3 - 1) x 6 = 24
    (5 + 2 - 1) x 4 = 24
    (6 + 2) x (4 - 1) = 24
    (5 - 2 + 1) x 6 = 24
    (5 + 4 - 1) x 3 = 24
    I solve this later (I hope)
    6 x 3 + 5 + 1 = 24
    -
    (3 + 4 + 5) x 2 = 24
    6 x 3 + 2 + 4 = 24
    6 x 5 - 2 x 3 = 24
    6 x 5 - 2 - 4 + 24
    - I have to go now

    (many edits because I first solved 1, then 2 etc.)
  3. Joined
    15 Oct '07
    Moves
    4056
    18 Jun '08 07:431 edit
    i wonder if i can remember all of them

    i know i can remember 1346 but the others i havnt done for a while

    what about mking 41 using 2, 6, 8, 10 and 11 still remember?

    EDIT: i wonder if 1,3,4,6 and 1,4,5,6 use the same technique or is there an easier way
  4. ALG
    Joined
    16 Dec '07
    Moves
    6190
    18 Jun '08 08:03
    Originally posted by banx99
    i wonder if i can remember all of them

    i know i can remember 1346 but the others i havnt done for a while

    what about mking 41 using 2, 6, 8, 10 and 11 still remember?

    EDIT: i wonder if 1,3,4,6 and 1,4,5,6 use the same technique or is there an easier way
    I only don't know the technique
  5. Joined
    03 Oct '07
    Moves
    3273
    18 Jun '08 08:21
    using 1 3 4 6:

    6 / (1 - 3/4)
    = 6 / (1/4)
    = 24

    another one to try: 5 5 5 1
  6. Joined
    15 Oct '07
    Moves
    4056
    18 Jun '08 08:51
    using 2, 6, 8, 10 and 11, see how high you can get starting from 24
    in other words, get 25, 26, 27 etc etc
    so far im past 50
  7. Standard memberTheMaster37
    Kupikupopo!
    Out of my mind
    Joined
    25 Oct '02
    Moves
    20443
    18 Jun '08 10:25
    To quote one of the regulars here:

    "SOLV'D".
  8. Joined
    15 Oct '07
    Moves
    4056
    18 Jun '08 10:361 edit
    Originally posted by TheMaster37
    To quote one of the regulars here:

    "SOLV'D".
    mine or fianchettos?

    EDIT: any help would be nice, i cant find an answer for 76
  9. Standard memberTheMaster37
    Kupikupopo!
    Out of my mind
    Joined
    25 Oct '02
    Moves
    20443
    19 Jun '08 12:30
    Originally posted by banx99
    mine or fianchettos?

    EDIT: any help would be nice, i cant find an answer for 76
    I'm referring to the 24 problem 🙂

    (1 - 1/5) * 5 is the one for 1, 5, 5, 5
  10. Joined
    12 Sep '07
    Moves
    2668
    19 Jun '08 12:47
    I suppose you mean (5-1/5)*5
  11. Standard memberTheMaster37
    Kupikupopo!
    Out of my mind
    Joined
    25 Oct '02
    Moves
    20443
    22 Jun '08 10:10
    Originally posted by Dejection
    I suppose you mean (5-1/5)*5
    Indeed I do 🙂

    I gave this to one of my classes the other day. They have never been that quiet in the entire year :p
  12. Joined
    15 Oct '07
    Moves
    4056
    23 Jun '08 00:16
    still wondering why no one can seem to solve for 76 using 2,6,8,10 and 11
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