Ratio: Calculate the ratio between radii of two circles

How many times longer is the radius of the red circle than the radius of the blue circle?

5

How many times longer is the radius of the red circle, which has a diameter of 24, than the radius of the blue circle, which has a diameter of 12?

2

How many times longer is the radius of the red circle than the radius of the blue circle?

$2$

How many times longer is the radius of the red circle (14 cm) than the radius of the blue circle, which has a diameter of 7?

4

How many times longer is the radius of the red circle than the radius of the blue circle?

$2\frac{1}{2}$