Answer:
21,753 is divisible by 3 and 9
Step-by-step explanation:
A number is divisible by 2 if last digit of a number is 0, 2, 4 ,6 ,8
A number is divisible by 3 if sum of digits is divisible by 3.
A number is divisible by 5 if last digit of a number is 0 or 5
A number is divisible by 9 if sum of digits is divisible by 9
A number is divisible by 10 if last digit is 0.
So, according to these rules option (a) 3 ,9 is correct
Therefore , 21,753 is divisible by 3 and 9.
