The H.C.F. of two numbers is 5 and their L.C.M. is 150. If one of the numbers is 25, then the other is:
Answer: B. 30
Product of two numbers = Product of their HCF and LCM.
Let one number = x
=> 25 × x = 5 × 150
=> x = (5 × 150) / 25
=> x = 30
If the number of boys in a class is 8 times the number of girls, which value can never be the total number of students?
The sum of two consecutive even numbers is 14. What are the numbers?