IMC 2012 Q12
12. Which one of the following has a different value from the others?
- A 18% of £30
- B 12% of £50
- C 6% of £90
- D 4% of £135
- E 2% of £270
Intermediate Mathematical Challenge 2012, Question 12. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: B 12% of £50
The values of the expressions are £5.40, £6.00, £5.40, £5.40, £5.40 respectively.
Solution © UK Mathematics Trust, from the IMC 2012 solutions. Longer versions with investigations: Solutions and investigations (PDF).