Please find attached a diagram with the completed table
In order to determine which number is a counterexample of the conjecture, we are to divide each number by 2 and 4. A counterexample of this conjecture would only be divisible by either 2 or 4 but not both of them
Dividing the numbers by 2
12 / 2 = 6
19 / 2 = 9.5
22 / 2 = 11
28 / 2 = 14
30 / 2 = 15
Dividing the numbers by 4
12 / 4 = 3
19 / 4 = 4.75
22 / 4 = 5.5
28 / 4 = 7
30 / 4 = 7.5
22 and 30 are counterexamples because they are divisible by 2 but not by 4
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