Math Trick : Repeating Digits #1

Trick 1:
Step1: Think of a 3 digit number.
Step2: Multiply it with x7x11x13.

Example: if Number= 345, Answer: 345345


Trick 2:
Step1: Think of a 2 digit number.
Step2: Multiply it with x3x7x13x37.

Example: if Number: 35, Answer: 353535