you are viewing a single comment's thread
view the rest of the comments
[–] 7 points 5 days ago (2 children)

I once spent 3 hours straight trying to figure out how to make 147 by only using 4 fours. Only to find out that my phone calculator doesn't even have the required operator key to make it work.

  • source
  • hideshow 2 child comments
  • [–] 1 point 4 days ago (1 child)

    I'm not sure what rules you were using, but addition/subtraction and multiplication will only ever give you even numbers and 147 is odd. If you're allowing division, then 4*37-(4/4).

  • source
  • parent
  • hideshow 1 child comment
  • [–] 2 points 4 days ago

    I was using a semi-standard set of Four Fours rules that allows Addition, Subtraction, Multiplication, Division, Concatenation (i.e. 44), Decimal points ( .4), Factorial, Square root and Exponentiation.

    The operand I was missing was the overline.

  • source
  • parent