Robin is making the color purple. The original ratio is 2 cups of blue for every 3 cups of red. She used a double number line to create equivalent ratios. Is 10:15 an equivalent ratio to 2:3? Explain.

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Find the solution of each of the following.

The area of a circle is equal to 1 dm². find the radius of the circle.