Comparing two rates

Difficulty Starter · Set 68fr7n

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1
Pack A holds 2 quarts for $5. Pack B holds 4 quarts for $9. Which is better value, A or B?
2
Pack A holds 6 quarts for $8. Pack B holds 12 quarts for $17. Which is better value, A or B?
3
Pack A holds 4 quarts for $8. Pack B holds 8 quarts for $17. Which is better value, A or B?
4
Pack A holds 6 quarts for $4. Pack B holds 12 quarts for $7. Which is better value, A or B?
5
Pack A holds 5 quarts for $2. Pack B holds 10 quarts for $5. Which is better value, A or B?
6
Pack A holds 6 quarts for $6. Pack B holds 12 quarts for $11. Which is better value, A or B?
7
Pack A holds 6 quarts for $7. Pack B holds 12 quarts for $13. Which is better value, A or B?
8
Pack A holds 4 quarts for $7. Pack B holds 8 quarts for $13. Which is better value, A or B?
9
Pack A holds 4 quarts for $3. Pack B holds 8 quarts for $7. Which is better value, A or B?
10
Pack A holds 3 quarts for $5. Pack B holds 6 quarts for $9. Which is better value, A or B?
11
Pack A holds 5 quarts for $7. Pack B holds 10 quarts for $13. Which is better value, A or B?
12
Pack A holds 3 quarts for $3. Pack B holds 6 quarts for $5. Which is better value, A or B?
13
Pack A holds 5 quarts for $3. Pack B holds 10 quarts for $7. Which is better value, A or B?
14
Pack A holds 6 quarts for $7. Pack B holds 12 quarts for $13. Which is better value, A or B?
15
Pack A holds 2 quarts for $2. Pack B holds 4 quarts for $5. Which is better value, A or B?
16
Pack A holds 4 quarts for $7. Pack B holds 8 quarts for $15. Which is better value, A or B?
17
Pack A holds 5 quarts for $2. Pack B holds 10 quarts for $3. Which is better value, A or B?
18
Pack A holds 6 quarts for $2. Pack B holds 12 quarts for $5. Which is better value, A or B?
19
Pack A holds 4 quarts for $3. Pack B holds 8 quarts for $7. Which is better value, A or B?
20
Pack A holds 3 quarts for $9. Pack B holds 6 quarts for $17. Which is better value, A or B?

What is in this set

The numbers in this set run from 2 to 19.
A careful solution takes 3 written steps on average.
Answers are a short answer exactly as the problem asks for it.

Drawing 240 problems from this page produced 76 different ones, 32% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.