How much is the teddy bear?

Posted on September 10, 2014December 8, 2015 by Wei

At first: ratio 3 : 1, difference = 2After: ratio 6 : 1 difference = 5Since the difference in price between the bear and clowns are the same, we make the ratio so that the difference is the same. So we multiply the first ratio by 5 and the second ratio by 2. i.e.At first:[…]

How many marbles did Mary buy?

Posted on May 3, 2014December 8, 2015 by Wei

This is a challenging question that we came across in class today. Here’s the question and two possible methods. Let me know if you have other methods! Question: Mary bought some red marbles and gave half to Noel. Noel bought some blue marbles and gave half to Mary. Mary lost 16 red marbles and Noel[…]