Question

Mrs Ananaya is buying pencils in packs of 12, notebooks in packs of 16, and red pens in packs of 20. She needs to buy the same number of pencils, notebooks, and red pens. What is the least number of packs of each item that she can buy?

Answer 1

Below

Explanation:

You need to find the LCD of 12 16 and 20

Using Prime Factorization:

12 = 2 * 2 * 3

16 = 2 * 2 * 2 * 2

20 = 2 * 2 * 5

2 2 2 2 3 5 so LCD will be 2 * 2 * 2 * 2 * 3 * 5= 240

so she will need 240 / 12 = 20 packs of pencils

240 / 16 = 15 packs of notebooks

240 / 20 = 12 packs of pens