Jharne De and Ranjana Kumar Solutions for Chapter: HCF and LCM, Exercise 2: Exercise

The product of two numbers is $15870$ and their HCF is $23$. Find their LCM.

The HCF of two numbers is $54$ and their LCM is $3888.$If one of the numbers is $432,$ find the other number.

The product of two numbers is $414720$ and their HCF is $144$. Find their LCM.

Find the least number which is exactly divisible by $18,24$ and $36$.

Find the least number which is exactly divisible by $32,36,40$ and $45$.

Find the lowest natural number which when divided by $112,140$ and $168$ leaves a remainder $8$ in each case.

Three bells ring at intervals of $15,20$ and $30$ minutes. If they all ring at $12$ noon together, at what time will they ring together again?

Two ropes $16 \mathrm{m}$ and $20 \mathrm{m}$ long are to be cut into small pieces of equal lengths. What will be the maximum length of each piece?