Note: FE: ED = 2 : 1, and that triangle FEC and triangle EDC has the same height. Therefore, the ratio of their areas is equal to the ratio of their bases. That is, Area FEC : Area EDC = 2: 1. Since area of square is 50, then Area EDC = 25. Hence, Area of triangle FEC = 50.

FE: ED is 2:1 Areas of square = 1x 1 unit = 1 square unit = 50 square units. Area of triangle = 1/2 x FE x CD = 1/2 × 2 ×1 = 1 square unit = 50 square units too

We get 50 too but model ans is 100cm2. Thanks for the confirmation of ans 50cm2

Area of rectangle ACDF = 50 cm x 3 = 150 sq.cm (since FD is thrice of ED which is = CD, & AF = CD). Area of ∆CDE = 50 sq.cm ÷ 2 = 25 sq. cm. Area of ∆ ACF = 1/2 x Area of rectangle ACDF = 75 sq cm. Therefore, area of ∆FCE = Area of Rectangle ACDF - Area of ∆CDE - Area of ∆ACF = 150 - 25 - 75 = 50 sq cm (Ans.)

Divide by 5. Sharon + 4 friends make 5 people. Key phrase is "equally WITH". Tricky but common. P3 level.

Agree. Should be divided by 5.

Ya..my daughter divide by 5 too..but answer divide by 4..faint!!

Because Sharon didn't keep any for herself.

Wa..this is testing P3 students on Math or english? Very stress!!

"How many stamps did EACH FRIEND receive?" So the clue might be "EACH FRIEND". Divide by 4.

If the question intended it to be divided by 4, then it's better to be phrased as 'gave to 4 friends'. Shared with 4 friends can imply Sharon is involved. Phrasing is not clear. If it's assessment book qn, ignore it. If it's school worksheet, clarify with teacher.

PSLE would be very clear :D

Sharon is not her friend so each friend implies only divide by 4.

"Equally with" 4+1 "Equally among her friends" 4 "Gave her friends" 4 These are the key words to look for. If not clarify with school teachers since they are the markers for the test papers.

Poor phrasing...causes confusion..check with the teacher..

Shared equally should mean divide by 5. Maybe mistake in answer.

Its from assessment book by Andrew Er..

Maybe our group got a Andrew Er who wrote this book??

Point is this.. No point debating if it's divide by 4 or 5...point is.. Question should be rephrased... a question that leaves room for such debate will not be allowed to be published in the examination paper in schools..at least not for me.. Lolz.

Tan Weiqiang, sad to say they use such phrasing to confuse the kids, i had encountered similar questions before and learnt thru mistakes.

This was an issue in the past. It will be phrased quite clearly in the exams. If it isnt, the child should ask the invigilator.

Don't worry Karen Lee... This is really a thing of the past.. No more such stuff in schools.. Trust me

Agree with Aurelia Tan completely

It's common to see mistakes in assessment books. They are not regulated. By and large, they are fine. However, good to be discerning to questions as well as methods. Overly difficult questions are not necessarily good questions.

Yup yup.. Very good clarification Yueh Mei.. The same goes for the questions on circles.. Lolz

Based on how I interpret the phrase, I would divide the number by 5 too. It says Sharon shared the stamps equally with 4 friends, meaning she would have a share of the stamps as well. If she did not have a share, then the word 'share' should not have been used. I would take assessment book answers with a pinch of salt. I've seen my fair share of mistakes in their model answers.

Thanks!