Alexander Puchmayr wrote: > Hi there, > > I just encountered an article about the oddities of number 42 and that > (-80538738812075974)^3 + 80435758145817515^3 + 12602123297335631^3 = 42. > I tried to verify in Kcalc, but got different result. I tried the same in > python, where I got the correct result of 42. > > Try easier numbers, lets say 3^3 - 3^3 + 1, which should give 1, but kcalc > says 28. > > Reproduce: > Press keys: 3, x^3, - , 3, x^3, +, 1, enter --> 28 > > Also (with intermediate results in square brackets): > 2^3 [8] + 2^2 [4] +[8] 2 = 10 (should be 14). > 2^3 [8] + 2^2 [4]+ 2^2 [4] + 2^2 [4] +[8] 1 = 9 (should be 21) > > It seems like as if the result of x^2 and x^3 are ignored in consecutive > additions/substractions. > > Kcalc version 18.12.3 > > Can anybody verify with other versions? > > Regards > Alex
I did the part right below Reproduce and got 28 as well. You would think the first two would result in 0 and adding 1 would give a result of 1. Thing is, different calculators have different ways of doing things which is where parenthesis come in. I have a old Radio Shack EC-4020 that has its own way of calculating things. It describes its methods in detail in the manual that comes with it. I've bought newer versions of calculators and they to have their own way. It seems Kcalc has its own way of doing things as well. I'm on version 19.04.3. Strange things like this happen. This is where a human being sitting down and doing it on paper comes in handy. Dale :-) :-)
