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# Test divisibility rule “7” with example 111111111111.

Debarati
100 Points
14 days ago
“The difference between twice the unit digit of the given number and the remaining part of the given number should be a multiple of 7 or equal to 0.”
Step 1: Multiply the unit digit with 2
Step 2: Remove the unit digit of the number
Step 3: Find the difference of these two numbers
Step 4: If the anwer is divisible by 7, then the given number is also divisible by 7
Ex-> 665:-
5*2= 10
Removing 5 from 665, we get 66
66-10= 56 which is a multiple of 7
$\therefore$665 is divisible by 7.