They are members of the set of numbers of the form 140*k where k is a positive integer less than 6.
140, 280, 420, 560, 700
The first four multiples of five: 5, 10, 15, 20
140, 280, 420, 560, 700.
140, 280, 420, 560, 700
140, 280, 420, 560, 700
140, 280, 420, 560, 700
140, 280, 420, 560, 700.
140, 280, 420, 560, 700
The first five common multiples of seven and twenty are: 140, 280, 420, 560, 700.
7, 14, 21, 28 and 35.
7, 14, 21, 28, 35
7, 14, 21, 28, 35.