AlgebraMediumGreatest whole number within a budget
Algebra practice question
A student has $80 to spend on a $20 entry ticket and rides that cost $6 each. What is the greatest number of rides the student can afford?
Answer: 10
20 + 6r ≤ 80 gives 6r ≤ 60, r ≤ 10. The greatest whole number is 10.
Common wrong answers
- If you answered 11
- 11 rides would cost $86, over budget.
- If you answered 13
- 13 spends the whole $80 on rides, forgetting the $20 ticket (80/6 ≈ 13.3).
- If you answered 16
- 16 comes from (80 + 20)/6, adding the ticket price instead of subtracting.
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