Question 3
Paul the beaver has four stamps A, B, C and D, as shown.
He used stamp B four times to make figure 1. Paul used stamp B once and stamp D twice to make figure 2. To make figure 3, which stamp can Paul definitely not use?
He used stamp B four times to make figure 1. Paul used stamp B once and stamp D twice to make figure 2. To make figure 3, which stamp can Paul definitely not use?