Question

Write the smallest and greatest values of a,so that the number formed is divisible by 3.
a) a6724​

Answer 1

A number is divisible by 3 if its sum of all digits is divisible by 3

(a) ___6724    

6+7+2+4= 19 

if we add 2 then the digit is divisible by 3  ( 19+2=21)

2 is the smallest digit 

26724 = 2 + 6 + 7 + 2 + 4 = 21

if we add 8 then the digit is divisible by 3  ( 19+8=27)

8 is the largest digit 

26724 = 8+ 6 + 7 + 2 + 4 = 36

Answer 2

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