HCF of two numbers is 1 and LCM is 221. If one of the two numbers is 17, find the other.
17
39
13
200
Let the unknown number be b. The other number is 17. Now, HCF × LCM = Product of the two numbers ⇒ 1×221=17×b ⇒b=13 ∴ The unknown number is 13.