- Thread starter Cjnschool
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Here's a hint: The LCM of 6 and 10 (Least Common Multiple) has something to do with this exercise. Tell us what that LCM is, and we can explain why it helps. If you haven't learned about common multiples, let us know.

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Suppose you buy 10 batteries:10-6=4---so you have 4 batteries left over,

Suppose you buy 20 batteries:20-6=14, 14-6 =8, 8-6 = 2---so you have 2 batteries left over.

Suppose you buy 30 batteries: 30 -6=24, 24- 6 = 18 -------can you finish from here?

I understand that your title is Division/Multiplication and I used subtraction. Please understand that I used repeated subtraction which is just division.

The LCM is 30guidelines? Please post what you've already tried or thought about, and we can go from there.

Here's a hint: The LCM of 6 and 10 (Least Common Multiple) has something to do with this exercise. Tell us what that LCM is, and we can explain why it helps. If you haven't learned about common multiples, let us know.

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Now refer back to response #3 above - and complete the solution.The LCM is 30

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That is correct, but you didn't post your thoughts about the exercise, so I can't know what you're thinking. (In future threads, please follow the guidelines, using the link provided in post #2.)The LCM is 30

The

There are many numbers that are common multiples of 6 and 10, but the exercise asks for the smallest one (30).

So the answer is, "The least number of battery packs that Marcus should buy is 30".

Here is a visual. Each square below is a battery. Each

1 Pack / 4 left over

■■■■■■ \(\quad\) ■■■■

2 Packs / 2 left over

■■■■■■ \(\quad\) ■■■■

■■■■■■ \(\quad\) ■■■■

3 Packs / 0 left over

■■■■■■ \(\quad\) ■■■■

■■■■■■ \(\quad\) ■■ \(\quad \; \quad\) ■■

■■■■■■ \(\quad\) \(\;\) \(\;\) \(\;\) \(\quad\) ■■■■

30 ÷ 6 = 5 sets of radio batteries

30 ÷ 10 = 3 battery packs