AlgebraEasy–MediumTwo jars from a total and a ratio
Algebra practice question
Two jars hold 16 marbles between them, and the first jar holds three times as many as the second. How many marbles are in the first jar?
Answer: 12
3s + s = 16 gives s = 4, so the first jar holds 12.
Common wrong answers
- If you answered 4
- 4 is the second jar.
- If you answered 8
- 8 splits the marbles evenly.
- If you answered 48
- 48 multiplies 16 by 3.
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