CH. 1 LESSON 14 ASVAB How to Find the Least Common Multiple

Least Common Multiple

(Also called LCM) The smallest number that can be divided evenly by those original two numbers.

Find the LCM of 13 and 15. A.) 390 B.) 195 C.) 1 D.) 45 E.) 210

13: 13, 26, 39, 52, 65, 78, 91, 104 15: 15, 30, 45, 60, 75, 90 3: 3, 6, 9, 12, 15 15 x 13 ------ 45 + 150 ------ 195

Find the LCM of 5 and 20. A.) 40 B.) 4 C.) 5 D.) 20 E.) 25

5: 5, 10, 15, 20, 20: 20 LCM: 20

What is the shorthand way of writing the least common multiple? A.) LCM B.) Expression C.) MIA D.) SOS E.) GCF

A.) LCM

Which sequence of numbers below is a list of multiples? A.) 1, 2, 4, 9, 16, ... B.) 0, 2, 6, 12, 20, ... C.) 5, 10, 15, 20, 25, ... D.) 1, 5, 6, 11, 16, 21, ... E.) 2, 3, 8, 15, 32, ...

C.) 5, 10, 15, 20, 25, ...

For which of the number pairs below could you NOT use the shortcut of simply multiplying the two numbers together to find the LCM? A.) 2 and 21 B.) 3 and 8 C.) 4 and 15 D.) 6 and 15 E.) 5 and 11

D.) 6 and 15 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60 15: 15, 30, 45, 60 LCM: 60 15 x 6 90 No