LCM and HCF Practice Test 1

48 – 38 = 10; 60 – 50 = 10; 72 – 62 = 10; 108 – 98 = 10 and also 140 – 130 = 10
Hence, required number = LCM of (48, 60, 72, 108, 140) - 10 Hence, LCM = 2 × 2 × 2 × 3 × 3 × 5 × 2 × 3 × 7 = 15120 - 10 = 15110