Question

how can you tell that 642 divisible by 3?​

Answer 1

Answer:

its divisibility rule states that the sum of the digits in the number should be divisible by 3.

Step-by-step explanation:

6+4+2=12

12 is divisible by 3

therefore 642 is divisible by 3

Answer 2

Answer:

add all the dogits in number

in this number digits are 6,4, and 2

so add 6+4+2=12

and add digits in 12

2+1=3

so 642 is divisible by 3

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