No.
To check if a number is a multiple of 3 add its digits together and if this sum is a multiple of 3, then so is the original number. This sum can be continued until a single digit remains; if the single digit is 3, 6 or 9 then the original number is a multiple of 3, otherwise not.
19 → 1 + 9 = 10
10 → 1 + 0 = 1 which is not 3, 6 or 9, so 19 is not a multiple of 3.
LCM(3, 19, 20) = 1140.
No. To find if a number is a factor of 3, add the number's digits. If the resulting number is a multiple of 3, then the original number is a multiple of 3. In 4339, the digits of the number added together is 19, which is not a multiple of 3.
51 - 19, D16
Any multiple of 19.
The Least Common Multiple (LCM) for 15 19 is 285.
The least common multiple of 19 , 3 , 7 = 399
19*3=57
Since 19 is a prime number, it is not divisible by 3 or 7.
The LCM of 3 and 19 is 57
42 is a multiple of 3 because 14*3 = 42
Least Common Multiple (LCM) for 3 12 19 is 228.
LCM(3, 19, 20) = 1140.
57
It is 57
228
The number is a multiple of 3 and 19 at the same time
912