Question

to check the divisibility of one number by other, we normally perform actual division and see whether remainders is zero or not.but the divisibility of a number by certain numbers like 4,9,6,8,5,11,7​

Answer 1

Step-by-step explanation:

First, take any number (for this example it will be 492) and add together each digit in the number (4 + 9 + 2 = 15). Then take that sum (15) and determine if it is divisible by 3. The original number is divisible by 3 (or 9) if and only if the sum of its digits is divisible by 3 (or 9).