In the first week, I learned about LCM and GCF. LCM or lowest common factor is when you have a small number that is a multiple of two numbers, a GCF or greatest common factor is when the highest number can divide into two or more numbers. I also learned about the number system, The Real Number system is a set of numbers that are Rational and Irrational numbers, the set of numbers that are in the real number system our Natural numbers so 1, 2, 3, … , Whole Numbers which is 0, 1, 2, 3, … , Integers -3, -2, -1, 0, 1, 2, 3, … , Rational/Irrational Numbers and Real Numbers.