In number theory, we deal only with integers and their properties. Many of you may have heard about this branch of mathematics but may not know much about it. Here I am going to introduce you to some of...
If you want square of any number which ends with 5 for 2 digit then Example: (25) ²= 625 Multiple last digit by itself which is 5x5=25 Then multiply the first digit by its next number like 2x3=6 So...