Question

7. If 64b2 is divisible by 3, what should be the digit in place of b?​

Answer 1

Answer:

b=0or3or6or9

Step-by-step explanation:

the rules of divisblity of 3 is used

Answer 2

Answer:

0 or 3

Step-by-step explanation:

If a number is divisible by 3, then the sum of all the digits must be divided by 3.

Then,

$6 + 4 + b + 2 = 12 + b$

So if 12+b is divisible by 3, then b must be either 0 or 3 itself.

Hence the required answer is 0 or 3.

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