Using GCF's & LCM's Open Response

The video tutorial explains how to solve a math problem involving greatest common factors (GCF) and least common multiples (LCM) using a real-world scenario. At a store's grand opening, every 10th customer receives a free sticker, and every 25th customer receives a free T-shirt. The tutorial is divided into three parts: Part A calculates the number of customers receiving free stickers, Part B calculates those receiving free T-shirts, and Part C identifies customers receiving both items. The tutorial uses organized lists to solve each part, demonstrating the application of GCF and LCM in practical situations.

How many customers received a free sticker at the store opening?

• 25

• 18

• 15

• 20

What is the frequency of customers receiving a free T-shirt?

• Every 20th customer

• Every 15th customer

• Every 25th customer

• Every 10th customer

How many customers received a free T-shirt during the store opening?

• 5

• 6

• 8

• 7

Which customers received both a sticker and a T-shirt?

• 60th, 120th, 180th

• 10th, 20th, 30th

• 25th, 75th, 125th

• 50th, 100th, 150th

How many customers received both a sticker and a T-shirt?

• 5

• 4

• 3

• 2