AlgebraVery hardTotal from two fractions and a remainder
Algebra practice question
A charity spent one quarter of its funds on rent and one third on salaries, leaving $25,000. How much money, in dollars, did it have at the start?
Answer: 60000
F/4 + F/3 + 25,000 = F gives 5F/12 = 25,000, so F = 60,000.
Common wrong answers
- If you answered 43750
- 43750 solves 7F/12 = 25,000, using the spent fraction as the remainder.
- If you answered 75000
- 75000 multiplies 25,000 by 3.
- If you answered 100000
- 100000 multiplies 25,000 by 4.
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