AlgebraEasy–MediumGreatest number of pens within a budget
Algebra practice question
Sara has 40 dollars. She buys a book for 12 dollars and then as many pens as she can at 3.50 dollars each. What is the greatest number of pens she can buy?
Answer: 8
12 + 3.5p ≤ 40 gives p ≤ 8.
Common wrong answers
- If you answered 9
- 9 rounds up and exceeds the budget.
- If you answered 11
- 11 ignores the book.
- If you answered 28
- 28 is the money left after the book.
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