Question

Question 5 (a)

Write the smallest digit and the largest digit in the blank space for the given number so that the number formed is divisibly by 3:
________6724

Answer 1

We know that a number is divisible by 3 if the sum of all digits is divisible by 3.
Therefore, Smallest digit: 2 $\to$ $\underset{–}{2}6724=2+6+7+2+4=21$ [21 is divisible by 3]
Largest digit: 8 $\to$ $\underset{–}{8}6724=8+6+7+2+4=27$ [27 is divisible by 3]