15, 30, 45
They are: 30, 60 and 90
The first common multiple of 3 4 5 and 7 is 420.
15 is a multiple of 3. 15 is a multiple of 5. That makes it a common multiple of 3 and 5.
45 is a multiple of 3. 45 is a multiple of 5. 45 is not a multiple of 33. 3 x 3 x 5 = 45
Which number is a factor of 10 , but not a multiple of 5
60, 120, 180
3 and 5 are factors of 15. 15 is a common multiple of 3 and 5.
5
The smallest multiple of 3 4 and 5 is 60.
To find the least common multiple of four numbers, you first break those numbers up into their prime factors. For 15, 9, 5 and 4 this can be done as follows: 15 = 3x5 9 = 3x3 5 = 5 4 = 2x2 The next step is to identify any common factors. In this case, there are two numbers that share a 3, so one of these can be discarded. There are also two numbers that share a 5, so one of these can be discarded. Take all the other primes (3, 5, 3, 2 and 2) And multiply them together to find the LCM: 3x5x3x2x2 = 180 Thus the least common multiple of 15, 9, 5 and 4 is 180.
No.15 = 3 x 5So for 200 to be a multiple of 15, it must be a multiple of both 3 and 5:2 + 0 + 0 = 2 which is not a multiple of 3 so 200 is not a multiple of 3.200 ends in 0, so it is a multiple of 5.Thus 200 is a multiple of 5, but not a multiple of 3; so it is not a multiple of 15.