Wikipedia
The McNuggets version of the coin problem was introduced by Henri Picciotto,
who included it in his algebra textbook co-authored with Anita Wah. Picciotto
thought of the application in the 1980s while dining with his son at
McDonald's, working the problem out on a napkin. A McNugget number is
the total number of McDonald's Chicken McNuggets in any number of boxes.
In the United Kingdom, the original boxes (prior to the introduction of
the Happy Meal-sized nugget boxes) were of 6, 9, and 20 nuggets.

Task

Calculate (from 0 up to a limit of 100) the largest non-McNuggets
number (a number n which cannot be expressed with 6x + 9y + 20z = n
where x, y and z are natural numbers).




0010 limit#:=100
0020 DIM nugget#(0:limit#)
0030 FOR a#:=0 TO limit# STEP 6 DO
0040   FOR b#:=a# TO limit# STEP 9 DO
0050     FOR c#:=b# TO limit# STEP 20 DO nugget#(c#):=TRUE
0060   ENDFOR b#
0070 ENDFOR a#
0080 FOR i#:=limit# TO 0 STEP -1 DO
0090   IF NOT nugget#(i#) THEN
0100     PRINT "Maximum non-McNuggets number: ",i#
0110     END
0120   ENDIF
0130 ENDFOR i#