IMC 2020 Q1
1. What is the value of \(2 - (3 - 4) - (5 - 6 - 7)\)?
- A 11
- B 9
- C 5
- D −5
- E −7
Intermediate Mathematical Challenge 2020, Question 1. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: A 11
The value of \(2 - (3 - 4) - (5 - 6 - 7) = 2 - (-1) - (-1 - 7) = 2 + 1 - (-8) = 2 + 1 + 8 = 11\).
Solution © UK Mathematics Trust, from the IMC 2020 solutions. Longer versions with investigations: Solutions and investigations (PDF).