P5 Mathematics SA1 2021 — Methodist Girls

Q: What is the missing number in the box? 4/5 × 13 = 4/5 × 7 + 4/5 + 4/5 + 4/5 × ____

C. 3. 4/5 × 13 means thirteen groups of 4/5. The right-hand side already has 4/5 × 7 (seven groups) plus 4/5 + 4/5 (two more groups), totalling 9 groups. To reach 13 groups, the missing factor must give 13 − 9 = 4 more groups, so 4/5 × 4. Wait — recheck: 7 + 1 + 1 = 9, plus 4/5 × ? must give 13. So ? = 4. Hence the answer is 4 (option D). Correction: option D = 4.

Q: Given that AE is the base of Triangle ACE, its corresponding height to calculate area of Triangle ACE is ____.

D. CD. The height of a triangle relative to a chosen base is the perpendicular distance from the opposite vertex to the line containing the base. AE lies along the horizontal line ADE, and CD is drawn perpendicular to AE from vertex C. Therefore CD is the corresponding height.

P5 Mathematics 2021 SA1 10 questions 30 marks

Source: Methodist Girls, 2021

This P5 Mathematics SA1 paper from Methodist Girls (2021) contains 10 questions worth 30 marks. Use it as a study reference for Mathematics topics typically tested at P5 level in Singapore schools.

Q1 MCQ 2 marks

What is the missing number in the box? 4/5 × 13 = 4/5 × 7 + 4/5 + 4/5 + 4/5 × ____

Q2 MCQ 2 marks 🖼 Visual

Given that AE is the base of Triangle ACE, its corresponding height to calculate area of Triangle ACE is ____.

Q3 Open-ended 2 marks

There are blue, green and red marbles in a box. The ratio of the number of blue marbles to green marbles is 4 : 5. The ratio of the number of red marbles to the total number of blue and green marbles is 5 : 6. What fraction of the marbles in the box are green marbles?

Q4 Open-ended 2 marks

Kevin baked some pies. He sold 1/3 of the pies in the morning. He sold 1/4 of the remainder in the afternoon. He had 156 pies left. How many pies did Kevin bake?

Q5 Open-ended 2 marks 🖼 Visual

The figure shows Triangle X in a square grid. Draw and label Triangle ABC such that it has the same area as Triangle X with base AB.

Q6 Structured 3 marks 🖼 Visual

PQRS is a square of sides 24 cm. It is made of 4 identical smaller squares. Find the area of the shaded part of PQRS.

Q7 Structured 4 marks

Janesh had some money. He spent $1450 on a laptop and 3/7 of the remainder on a camera. He still had 1/3 of his money left. (a) How much money did he have at first? (b) How much money did he spend altogether?

Q8 Open-ended 4 marks

The ratio of the number of Kelly's stamps to the number of Jamie's stamps was 4 : 9. After Kelly bought another 15 stamps, Jamie still had 45 more stamps than Kelly. How many stamps did Kelly have in the end?

Q9 Open-ended 4 marks 🖼 Visual

The figure below is made up of a rectangle and a square. The length of the rectangle ABFG is 15 cm. Its breadth is 2/5 of its length. CDEF is a square of sides 11 cm. Find the area of the shaded part.

Q10 Open-ended 5 marks

Sumei and Aqil had a total of $525. After Sumei spent 2/5 of her money and Aqil spent $105, the ratio of the amount of money Sumei had left to the amount of money Aqil had left became 1 : 3. What was the ratio of Aqil's money to Sumei's money at first? Give your answer in the simplest form.

P5 Mathematics SA1 2021 — Methodist Girls

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