Question

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.

Answer 1

Yes, the common multiples of 3 and 5 in the purple part will still be in the red and blue circles.

15 is the smallest among the common multiples.

Common multiples of 2 and 7 are 14, 28, 42, 56, 70, and so on.