the  HCF and LCM  of  two  numbers  are  13  and  1989  respectively . If  one  of  the  numbers is  117  then  find  the  other  number .

We know that product of two numbers is equal to the product of HCF and LCM.

Ist number × Second number = HCF × LCM

117 × Second number = 13 × 1989

Second number = 13 × 17 = 221