Question

Activity - I
This is a game to played with your friend.
Give the following instructions to your friend.
Step 1: Write down any 3-digit number without showing it to you.
Step 2: Write the same number again next to the original number and get a 6-digit number
Step 3: Divide this 6-digit number by 7.
Step 4: Divide the quotient by 11. (it will divide exactly again)
Take the final quotient from your friend and just divide by 13. That will be your friend's number.
Find how the above trick works.​

Answer 1

good game my frds numbrr 12

and 50 is another friend number