Answer:
Step-by-step explanation:
Divisibility rule when a number is divisible by 11:
Take the alternating sum of digits in a number read from left to right .If that is divisible by 11 then the the given number is divisible by 11.
It is a divisibility rule of 11.
Let 1342 is a number .The number is divisible by 11 or not
Alternating sum of digits =1-3+4-2=0
The alternating sum of digits is divisible by 11 .
Therefore, the number 1342 is divisible by 11.
Let a number 2728
Alternating sum of digits = 2-7+2-8=-11.
The alternating sum of digits is divisible by 11 .
Therefore, the number 2728 is divisible by 11.
