" MATHEMATICS can be your best friend if you will use it frequently but it can be your worst enemy if you will neglect using it daily."

How many times can you subtract 7 from 83, and what is left afterwards? You can subtract it as many times as you want, and it leaves 76 every time.

M4Math helped me a lot.

Thanks m4 maths for helping to get placed in several companies.
I must recommend this website for placement preparations.