NCERT Solutions for Chapter: Be My Multiple, I'll be Your Factor, Exercise 11: Common factors

Write the factors of $25$ in the red circle and the factors of $35$ in the blue circle.

Which are the factors you have written in the common part (purple) of both circles? These are common factors of $25$ and $35.$

Now write the factors of $40$ in the red circle and $60$ in the blue circle.

What are the factors written in the common (purple) part of the circle? Which is the biggest common factor of $40$ and $60?\mathrm{}$

Look at the factor tree. Now can you make another tree like this?

In how many ways can you draw a factor tree for $24$?

Draw three of them below.