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+--- Thread: little math puzzle. Map 1 0 -1 to 1 0.5 0 (/thread-10771.html)
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RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Dieter - 05-21-2018 08:12 PM
(05-21-2018 08:07 PM)J-F Garnier Wrote: 2 / INT
That's also my final solution.
Dieter
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Logan - 05-21-2018 08:15 PM
How about:
7
x<>y
MOD
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Gerson W. Barbosa - 05-21-2018 08:25 PM
(05-21-2018 07:46 PM)Dieter Wrote:(05-21-2018 07:33 PM)Joe Horn Wrote: 1 – SQRT
Works on all RPN/RPL models, I think.
Hey, that's a good one!
My solution is different, but takes the same three steps.
Anyone else with three steps? Or even less?
2 / INT
HP-42S:
2 BASE/
hp 33s:
2 INT/
Gerson.
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Arno K - 05-21-2018 08:27 PM
Ok, after the fail above (always check twice) here a new attempt:
R->B
SR
B->R
so three steps
Arno
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Logan - 05-21-2018 08:28 PM
(05-21-2018 08:25 PM)Gerson W. Barbosa Wrote: HP-42S:
2 BASE/
Nice! I started down that path but didn't remember the BASE/ function.
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Arno K - 05-21-2018 08:50 PM
On the Prime there is BITSR(), 1 step.
Arno
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Werner - 05-21-2018 09:11 PM
DSE X
SQRT
Cheers, Werner
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Gerson W. Barbosa - 05-21-2018 11:09 PM
(05-21-2018 04:31 PM)Dieter Wrote: For three points it can always be done with a parabolic fit. But maybe there also is another and shorter/faster way to do it. ;-)
What about
5 -> 2
2 -> 1
1 -> 0
A longer and slower way here. :-)
Gerson.
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Gerson W. Barbosa - 05-21-2018 11:15 PM
(05-21-2018 08:15 PM)Logan Wrote: How about:
7
x<>y
MOD
An interesting solution, regardless the number of steps. This works on the 33s as well (Rmdr == MOD).
Gerson.
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Joe Horn - 05-22-2018 12:15 AM
(05-21-2018 08:25 PM)Gerson W. Barbosa Wrote: hp 33s:
2 INT/
The same idea in RPL is 2 IQUOT.
RE: little math puzzle. Map 1 0 -1 to 1 0.5 0 - Dieter - 05-22-2018 05:59 AM
(05-21-2018 08:15 PM)Logan Wrote: How about:
7
x<>y
MOD
(05-21-2018 09:11 PM)Werner Wrote: DSE X
SQRT
Nice – two very cool solutions.
If you have calculators with the respective commands, that is. ;-)
2 / INT probably is the most universal one.
Other solutions with more special commands:
2 INT÷ (HP35s)
2 IDIV (WP34s)
LN ROUNDI (WP34s)
Dieter