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PrintSouth African Mathematics Olympiad First Round
South Africa algebra
Problem
John spends a total of hours weeding, planting and watering in his garden. He spends minutes more on weeding than planting, and minutes less on watering than planting. How many minutes did he spend planting?
(A) (B) (C) (D) (E)
(A) (B) (C) (D) (E)
Solution
If he spends minutes on planting, then his total time spent in the garden is and is minutes. This means , so .
Final answer
D
Techniques
Simple Equations