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A store has two brands of pencils on sale for the day. Brand A comes in packs of 4, and Brand B comes in packs of 10. If an equal number of each brand sold, what is the minimum number of each sold?

A) 14
B) 20
C) 28
D) 36

Respuesta :

the answer is B. all you have to do is find the lowest common factor between them both because the problem says what is the minimum number sold.

Answer:

B) 20  

Step-by-step explanation:

We want the first number that both 4 and 10 will go into; this is the least common multiple (LCM).

To find the LCM, we find the prime factorization of each number:

4 = 2(2)

10 = 5(2)

The LCM is the common factor (2) multiplied by the uncommon factors (2 and 5):

2(2)(5) = 4(5) = 20

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