If 31p5 is a multiple of 3,where p is a digit,what might be the value

1.	If 31p5 is a multiple of 3,where p is a digit,what might be the value of p?
Answer» Answer: Explanation: The DIVISIBILITY test for a number to be divisible by 3 is the sum of DIGITS constituting number Sould be a multiple of 3 3z5 is divisible by 3 Hence ( 3 + 5 + z ) i.e. ( z + 8 ) is a multiple of 3 . For z = 1 , sum is 9 . Similarly for z = 4 , z = 7 the sum will be divisible by 3 .

If 31p5 is a multiple of 3,where p is a digit,what might be the value of p?

Answer»

Answer:

Explanation:

The DIVISIBILITY test for a number to be divisible by 3 is the sum of DIGITS constituting number Sould be a multiple of 3

3z5 is divisible by 3

Hence ( 3 + 5 + z ) i.e. ( z + 8 ) is a multiple of 3 .

For z = 1 , sum is 9 .

Similarly for z = 4 , z = 7 the sum will be divisible by 3 .