Question

check the divisibility of the following number by 3,9 by 723​

Answer 1

Answer:

we know that is the sum of the digits of a no. is divisible by 3 then the whole no. is divisible by it..

therefore,

723= 7+2+3 = 12 ( divisible by 3 )

that is.. 723 is divisible by 3.

now we know that 9 is also having the same divisibility rule.

therefore,

7+2+3 = 12 (not divisible by 9 ) .

that is,

723 is divisible by 3 but not by 9

Answer 2

Answer:

There is divisblity table .

To check the divisblity of 3 and 9 = sum of all digit is divisible by 3.

So,723= 7+2+3= 12

12 is divisble by 3 and 9 .

So, 723 is divible by 3 and 9.