30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, ...
well five times two is ten so double five and you have the same multiples
5,10,15,20,25,30,35,40,45,50
Five and ten are factors of ten and multiples of five.
Halfway between any two multiples of ten is always a multiple of five because each multiple of ten is also a multiple of five. For example, if you take the multiples of ten 20 and 30, their halfway point is 25, which is a multiple of five. This holds true for any pair of multiples of ten, as the average will always yield a number divisible by five.
No.
20, 40, 60
30
well five times two is ten so double five and you have the same multiples
20, 40 and 60
90, 180, 270
5,10,15,20,25,30,35,40,45,50
15, 21, 27, 33, 39
Five and ten are factors of ten and multiples of five.
Halfway between any two multiples of ten is always a multiple of five because each multiple of ten is also a multiple of five. For example, if you take the multiples of ten 20 and 30, their halfway point is 25, which is a multiple of five. This holds true for any pair of multiples of ten, as the average will always yield a number divisible by five.
No.
Get the first common multiple, then multiply that by 0, 1, 2, 3, 4, etc. to get additional common multiples.
7 is a prime number. The answer is 1.