There are an infinite number of common multiples of 21 and 15 .The smallest two of them are 105 and 210 . A couple of others are 1,890 and 453,705 .
It is 18, the middle number when they are in order.
21 is the smallest #. 147 / 21 = 7.
It is: 21+18+15 = 54 and 54/3 = 18 which is the mean average
It is 18, the number in the middle when they are arranged in order.
The least common multiple is the smallest positive number that is the multiple of two or more numbers. 3: 3, 6, 9, 12, 15, 18, 21 21: 21 The LCM of 3 and 21 is 21.
If it needs to be natural it is one.
They are 16, 18 and 20.
three
There are an infinite number of common multiples of 21 and 15 .The smallest two of them are 105 and 210 . A couple of others are 1,890 and 453,705 .
It is 18, the middle number when they are in order.
21 is the smallest #. 147 / 21 = 7.
It is: 21+18+15 = 54 and 54/3 = 18 which is the mean average
It is 18, the number in the middle when they are arranged in order.
3
The range of the numbers is the largest minus the smallest: largest is 29, smallest is 17 ⇒ range = 29 - 17 = 12
3 = (3)*15 + (-2)*21