Given: LCM = 40 times HCF The product of the numbers is 1440 Formula used: LCM × HCF = Product of numbers Calculation: Let HCF of the number be 'H' ⇒ LCM = 40H Now, LCM × HCF = Product of numbers ⇒ 40H × H = 1440 ⇒ H2 = 1440/40 = 36 ⇒ H = 6 ∴ HCF = 6