The rule is "× 2". Start with the number 2, and find the next three numbers.
2, 4, 8, 16
2, 5, 8, 15
2, 5, 9, 17
54, 51, 48, 45, 42, 39, 36
Any number multiplied by 5 will give an answer ending in zero or 5.
True
False
