Question

3.
Write any 4-digit number check whether it is divisible by 3 and 9 or not​

Answer 1

Answer:

An easy way to determine if a number is divisible by nine is to add up all of the digits. If the sum of the digits is divisible by nine then the original number is also divisible by nine. For example, 4,518. 4+5+1+8=18. 18 is 9x2 so 4,518 is also divisible by nine. Now, if you add 3 or 6 to that number it is still divisible by 3 but not by nine. So, to answer your question, there are literally hundreds of four digit numbers that are divisible by three but not by nine. Just find any four digit number that is a factor of nine and add three or six to it. Examples would be 1,002, 1,005, 1,011, etc.

Step-by-step explanation: