In this lesson our instructor talks about greatest common divisor. The vocabularies for this lesson are factor, common divisor, and greatest common divisor. She talks about finding the GCD by listing divisors and using the prime factorization to find GCD. She discusses GCD in word problems. Four complete extra example videos round up this lesson.
Find the GCD of 15, 30, and 65 by using prime factorization.
3 ·10 =
2 ·3 ·5
Common factor: 5
A rabbit has three carrots measuring 16, 24, and 32 inches. She wants to cut these carrots into as many equal pieces as possible without wasting any material. How long should each piece be cut into? List divisors to solve this proble.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Greatest Common Divisor
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.