IMC 2020 Q13
13. What is half of \(1.6 \times 10^6\)?
- A \(8 \times 5^6\)
- B \(4 \times 10^6\)
- C \(8 \times 10^5\)
- D \(8 \times 10^2\)
- E \(1.6 \times 10^3\)
Intermediate Mathematical Challenge 2020, Question 13. © UK Mathematics Trust. Original paper on ukmt.org.uk
Answer: C \(8 \times 10^5\)
Half of \(1.6 \times 10^6\) equals \(0.8 \times 10^6 = 0.8 \times 10 \times 10^5 = 8 \times 10^5\).
Solution © UK Mathematics Trust, from the IMC 2020 solutions. Longer versions with investigations: Solutions and investigations (PDF).