
Marie had the same number of red, green and blue beads at first. After using some red and green beads and 1108 blue beads to make necklaces, Marie had 4250 beads left. There were twice as many red beads as green beads left. The number of blue beads left was 680 fewer than the number of red beads left. How many blue beads did she have at first?








Today's question involves the 'before and after' concept. Students need to draw the 'after' model and from there, work back to get the 'before' model. From that point onwards, it becomes very mechanical and easy to solve. Hope it helps!
