Question

8,10,12,15,18,19,20,21,22,23,24,25,26,27,30,36,38,40,42,45,48 wich number have 3 as a factors ?

Answer 1

12,15,18,21,24,27,30,3642,45,48

Answer 2

Answer:

12, 15, 18, 21, 24, 27, 30, 36, 42, 45 and 48

Step-by-step explanation:

To test the divisibility of a number by 3, we can try to add the digits of that number. If the resulted sum is a multiple of 3, then the number is a divisible by 3, means 3 is it's factor.

For example, 12 =>2+1

=> 3

Since 3 is a multiple of 3, therefore, 12 is a multiple of 3.

Similarly, 15, 18, 21, 24, 27, 30, 36, 42, 45 and 48 are the multiples of 3. While the others are not.