One possible rule is
Un = (-1493n3 + 13443n2 - 38890n + 36024)/6 for n = 1, 2, 3, 4.
There are 16 subsets: {0, 5, 7, 12}, {0, 5, 7}, {0, 5, 12}, {0, 7, 12}, {5, 7, 12}, {0, 5}, {0, 7}, {0, 12}, {5, 7}, {5, 12}, {7, 12}, {0], {5}, {7}, {12}, and the empty set.
If a number ends with 0, it is divisible by 10. If a number ends with 5 or 0, it is divisible by 5.
The rule is (-2, -5)
if the number ends on 5 or 0 the number is divisible by 5
If the number ends in 5 or 0 the whole number is divisible by 5.
There are 16 subsets: {0, 5, 7, 12}, {0, 5, 7}, {0, 5, 12}, {0, 7, 12}, {5, 7, 12}, {0, 5}, {0, 7}, {0, 12}, {5, 7}, {5, 12}, {7, 12}, {0], {5}, {7}, {12}, and the empty set.
Any number ending with 0 or 5 is a multiple of 5 except 0 itself.
If a number ends with 0, it is divisible by 10. If a number ends with 5 or 0, it is divisible by 5.
The rule is (-2, -5)
If the number ends in 5 or 0 the whole number is divisible by 5.
if the number ends on 5 or 0 the number is divisible by 5
The ISBN of Wizard's First Rule is 0-312-85705-5.
If the number ends in 5 or 0 the whole number is divisible by 5.
Distance from (0, 0) to (5, 12) using distance formula is 13
1, 2, 5, 10, 757, 1514, 3785, 7570
all numbers whose last digits are 5 and 0
14/15 + 3/5 = 14/15 + 9/15 = 23/1514/15 + 3/5 = 14/15 + 9/15 = 23/1514/15 + 3/5 = 14/15 + 9/15 = 23/1514/15 + 3/5 = 14/15 + 9/15 = 23/15