NCERT Solutions for Chapter: Be My Multiple, I'll be Your Factor, Exercise 6: Common Multiples

Think of a number. If it is a multiple of $3$, write it in the red circle. If it is a multiple of $5$, write it in the blue circle.

Some numbers are multiples of both $3$ and $5.$

So we can say that they are common to both $3$ and $5.$

Think! If you write the multiples common to $3$ and $5$ in the purple part, then will they still be in both the red and the blue circles??

Which is the smallest among these common multiples?

Repeat the game using the numbers $2$ and $7.$

Write the common multiples of $2$ and $7.$

Putting the multiples of $4$, $6$ and $5$ in the circles.

What common multiples of $5$ and $6$ did you write in the green part?
 

What common multiples of $4$ and $6$ are written in the orange part?
 

In which coloured part did you write the common multiples of $4$, $6$ and $5$?
 

What is the smallest common multiple of $4, 6$ and $5$?