Question

The math teacher of class 7 f has tasked the students with writing a program in python to find out whether a given number is divisible by 3 or not. How should they proceed?

Answer 1

Answer:

Divisibility by 7 can be checked by a recursive method. A number of the form 10a + b is divisible by 7 if and only if a – 2b is divisible by 7. In other words, subtract twice the last digit from the number formed by the remaining digits. Continue to do this until a small number.

Answer 2

Answer:

Example:  

Input: N = 12  

Output: YES

Explanation:  

   As sum of digits of 12 = 1 + 2 = 3

   and 12 is divisible by 3  

   So the output is YES

Input: N = 123

Output: NO

Explanation:

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