Puzzle 51.1

This is the classic four fours puzzle. You would probably know 1-10

1-25 now.

You can use: Addition (+), Subtraction (-), Multiplication (*), Division (/ or fraction bar), Powers (^), Roots (fourthrt/sqrt)(Square roots are the exception to the “Nothing but fours” rule), Factorials (!), Decimals (.), Repeating decimals (…)

Example:
0=4+4-4-4
1=4/4+4-4

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One Response to Puzzle 51.1

  1. James says:

    I already gave the answer to 1 so here:
    (All of these I solved myself so your answers may not match exactly. this is just one set.)

    2 = 4/4+4/4
    3 = 4+(4/4)^4
    4 = 4+4-sqrt4-sqrt4
    5 = 4+(4/4)^4
    6 = 4+sqrt4*4/4
    7 = 4+4-4/4
    8 = 4+4*4/4
    9 = 4+4+4/4 (familiarize yourself with this pattern. Whenever you have a 1 or 2 four number [like this] you can build off it for 2 digits to either side. I only really got the hang of this trick at the end, but keep it in mind.)
    10 = 4*4-4-sqrt4
    11 = 4/.4+4/4
    12 = 4!/4+4!/4
    13 = 44/4+sqrt4
    14 = 4*4+sqrt4-4
    15 = 4*4-4/4
    16 = 4*4*4/4
    17 = 4*4+4/4
    18 = 4*4-sqrt4+4
    19 = 4!-4-4/4
    20 = 4!-4*4/4
    21 = 4!-4+4/4
    22 = 4!-sqrt4+4-4
    23 = 4!-(4/4)^4
    24 = 4!*(4/4)^4
    25 = 4!+(4/4)^4

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