Question 6
Let A, B, C, D, E, F, G and H be a re-arrangement of prime numbers 2, 3, 5, 7, 11, 13, 17 and 19. What is the smallest possible value of $A\times B+C\times D+E\times F+G\times H$?
IMSO Maths · IMSO 2025 Mathematics — International Short Answer