Example: LCM of 4 and 8
8 is the least common multiple of 4 and 8
Least Common Multiple (LCM)- Lesson
LCM is the smallest factor which is common in the given numbers or the smallest common number which can be divided with all the given numbers completely. 
Greatest Common Factor (GCF)- Lesson
GCF the greatest common factor among all the given numbers or the greatest factor which divides all the given numbers completely (zero remainder).
Rules to find GCF :
(1) Factor method: follow the steps given below:
Step1: find all the factors of given numbers. (To know how to find factors, Click here.)
Step 2: Identify the greatest common factors.
Exponents- Lesson
‘Exponent’ is a number which tells us that “how many times a number is multiplied with itself” or Exponent represents the process of repeated multiplication. The exponent is also called ‘power’ and the number being multiplies is called the ‘base’.
Trigonometry- Lesson 1
Trigonometry (from Greek trigōnon, ‘triangle’ and metron, ‘measure’) is all about triangles. It is a branch of Mathematics that studies relationships between side lengths and angles of triangles. The most commonly used triangle is ‘Right Angles Triangle’.
Pronouns- Lesson
Pronoun: A Pronoun is a word which replaces a noun or a word which can be used in place of a noun is a pronoun. The words such as I, he, she, they, what, where, whose etc. are pronouns.
Review: Probability quiz
Complete this quiz to review the concept of probability and to quick remind the facts of probability: