And Answers: 2017 Psle Math Questions

Remaining empty: ( 1 - \frac{7}{12} = \frac{5}{12} ) tank.

Mrs. Lim had a roll of ribbon that was 5.4 m long. She used 0.8 m of ribbon to wrap each small gift box and 1.2 m to wrap each large gift box. She wrapped 3 more large boxes than small boxes. After wrapping all the boxes, she had no ribbon left. How many small boxes did she wrap? Step-by-Step Solution Let the number of small boxes = ( S ). Number of large boxes = ( S + 3 ). 2017 psle math questions and answers

In 2 hours: ( 2 \times \frac{7}{24} = \frac{14}{24} = \frac{7}{12} ) tank filled. Remaining empty: ( 1 - \frac{7}{12} = \frac{5}{12} ) tank

Ribbon used for small boxes: ( 0.8 \times S ) metres. Ribbon used for large boxes: ( 1.2 \times (S + 3) ) metres. She used 0

Total ribbon: [ 0.8S + 1.2(S + 3) = 5.4 ] [ 0.8S + 1.2S + 3.6 = 5.4 ] [ 2.0S + 3.6 = 5.4 ] [ 2.0S = 1.8 ] [ S = 0.9 ]