If the least common multiple of two numbers is 225 and the highest common factor is 5 then find the numbers when one of the numbers is 25? 

Given:

LCM = 225, HCF = 5, and One of the number is 25.

Formula used:

First Number × Second Number = LCM × HCF

Calculation:

Let the second number be x.

First Number × Second Number = LCM × HCF

⇒ 25 × x = 5 × 225

⇒ x = (5 × 225)/25 ×22525

⇒ x = 5 × 9 = 45

∴ The second number is 45.