Dr Kevin Olding - Mathsaurus on Instagram: "Question 2 of the #ukmt Intermediate Maths Challenge 2025 #imc2025 #mathschallenge #imc #imc2025 This video includes questions from past UKMT maths challenge papers with the express permission of UK Mathematics Trust. The questions may not be copied or made available elsewhere without the permission of the UK Mathematics Trust except in accordance with their policy on the use of intellectual property which may be found here: bit.ly/UKMTIP"