B Nirmala Shastry Solutions for Exercise 6: EXERCISE 4.6

Find the first four common multiples of $10$ and $15$

Write numbers less than $100$ which are common multiples of $4$ and $5$.

Which of the following have no common factor? Can we call them Co-prime?

A number is divisible by both $5$ and $12$. By which other numbers will that number be always divisible?

A number is divisible by $18$. By which other numbers will that number be divisible?

I am a common multiple of $3, 5$ and $6$. I am less than $60$. Which number am I?

Write any $5$ pairs of co-prime numbers.

Write numbers less than $50$ which are common multiples of $8$ and $12$.