IMC 2004 Q13
13. Four of these points lie on a single straight line. Which is the odd one out?
- A (−3, −3)
- B (−2, −1)
- C (2, 5)
- D (4, 11)
- E (5, 13)
Intermediate Mathematical Challenge 2004, Question 13. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: C (2, 5)
Points (−3, −3), (−2, −1), (4, 11) and (5, 13) all lie on the line whose equation is \(y = 2x + 3\), but (2, 5) does not lie on this line.
Solution © UK Mathematics Trust, from the IMC 2004 solutions.