The article discusses different versions of the beta distribution, a mathematical model used in various fields. The beta-IV distribution, also known as the PERT distribution, is used in project planning. The beta rectangular distribution combines two other distributions to show how they can work together. The Kumaraswamy distribution is similar to the beta-I distribution and can show both positive and negative skewness. The chapter explores the possible values for skewness and kurtosis in these distributions.