Question
Solution
LCM (3, 7, 11) = 231 By taking the largest 5-digit number 67699 and divide it by 231. ∵ 67699 = 231 × 293 + 16 67699 = 67683 + 16  67699 - 16 = 67683 (completely divisible by 231) 67683 = 676xy (where x = 8, y = 3) (3x - 5y) = 3 × 8 - 5 × 3 24 - 15 = 9 ∴ The required result = 9
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