GK 2016 Q4
4. In my school, 60% of the teachers come to school by bicycle. There are 45 teachers who come to school by bicycle. Only 12% come to school by car. How many teachers come to school by car?
- A 4
- B 6
- C 9
- D 10
- E 12
Grey Kangaroo 2016, Question 4. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: C 9
The percentage of teachers coming to school by car is one fifth of the percentage of teachers coming to school by bicycle. Therefore, the number of teachers coming to school by car is \(\tfrac{1}{5} \times 45 = 9\).
Solution © UK Mathematics Trust, from the GK 2016 solutions.