Question

write the following divisibility test for 3,4 and g coith their example​

Answer 1

Answer:

divisibility test for 3

if sum of digits of a number is divisible by 3 then n-1 number is divisible by 3

example 729

sum of the digits is equal to 7 + 2 + 9 is equal to 18

18 is divisible by 3

so 729 is also divisible with 3

divisibility test for 4

number formed by last two digits is divisible by

4 then the number is divisible by 4

428 number formed by last two digits is 28

28 is divisible by 4 so 428 is also divisible by 4