discrete unit one rules
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#2 The last digit of the number ends in o, 2, 4, 6, or 8
516 is divisible by 2 because the last digit is 6
#9 sum of all digits divided by 9
549 5+4+9=18 18/9
#8 last 3 digits divide by 8
6,427,120 120/8
#4 last two digits are divisible by 4
1,268,416 16/4
#3 sum of all digits is divisible by 3
168 1+6+8=15 15/3=5
#6 divide by 3 rule or divide by 2
168/2 =84 1+6+8= 15/3
#10 ends in 0
210
#12 must follow 3 or 4 rule
216 2+1+6=9 9/3 16/4
#5 ends with 5 or 0
255 250
