Dear all,
Please try out this question on a piece of paper using the shapes to solve the problem.

Mrs Kim had a total of 33 watches and necklaces in her shop. After selling some watches and necklaces, she had 12 of them left. The ratio of the number of watches sold to the number of watches left was 1 : 2. The ratio of the number of necklaces sold to the number of necklaces that were left was 3 : 1. How many necklaces were there at first? Enjoy ....:) Mrs Mak