Question

Colour the multiples of $2$ and $5$ in the grid.
The common multiples from the grid are

• A. $2,10$
• B. $5,10$
• C. $10,20,30$
• D. $10,20$

Answer 1

Answer: (D)

$10,20$

We know that a multiple of a number is that number multiplied by an integer. Integers are negative as well as positive.

Now, we write the multiples of $2$ and $5$ are as follows:

Multiples of $2$ are $-2,-4,-6,-8,-\mathrm{10.....},2,4,6,8,10,.......$

Multiples of $5$ are $-5,-10,-15,-20,-\mathrm{25.....},5,10,15,20,25,.......$

Now, from the given grid of numbers, the common multiples of $2$ and $5$ are $10,20$ because both of these numbers are divided by both $2$ and $5$.

Hence, the common multiples of $2$ and $5$ are $10,20$.