# BIHAR CGL PRE LCM AND HCF QUIZ - 15

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## Question 1:

Five bells started ringing simultaneously at 12 o'clock. If these bells ring with an interval of 5, 10, 15, 20, 25 seconds respectively, then how many times will the bells ring together in the next 45 minutes?

## Question 2:

Two numbers are in ratio 1: 2 and their HCF is 16. Their LCM is:

## Question 3:

The LCM of two numbers is 48 . The numbers are in the ratio $1: \frac{2}{3}$. The sum of the numbers is

## Question 4:

The LCM of two numbers is 114 times their HCF. If the sum of LCM and HCF is 2300 and one of the numbers is 380 , find the other number.

## Question 5:

The least common multiple of three numbers is four times their greatest common multiple. Also the sum of both of them is 125 . Accordingly, if one number is 100  then what will be the other number?

## Question 6:

The LCM of 112,72 and 90 is :

## Question 7:

What is the smallest number which if divided by 35,45,55 leaves remainder 18,28,38 respectively?

## Question 8:

What is the HCF of $\frac{15}{14}, \frac{12}{35}$ and $\frac{40}{49}$ ?

## Question 9:

The HCF of two numbers is 6 and the LCM is 108, if one number is 12 then find the other number.

## Question 10:

The LCM of 60 and 54 is.