Home Past papers Mathematics P4 Mathematics CA2 2023 — Maha Bodhi
P4 Mathematics CA2 2023 — Maha Bodhi
P4
Mathematics
2023
CA2
13 questions
30 marks
Source: Maha Bodhi, 2023
This P4 Mathematics CA2 paper from Maha Bodhi (2023) covers fractions, measurement, geometry and angles and patterns and algebra across 13 questions worth 30 marks. Practise Mathematics the way it's tested at P4 level in Singapore, with step-by-step answers on LearnBuddy.
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Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13
Q1
MCQ
2 marks
🖼 Visual
Visual context
Horizontal number line marked with 2 on the left and 3 on the right, with the interval divided into 8 equal segments by tick marks. An upward arrow labelled P points to the 5th tick after 2.
In the number line, what is the fraction represented by P?
1. 5/7
2. 5/8
3. 2 5/7
4. 2 5/8
Explanation
The number line shows the interval from 2 to 3 divided into 8 equal parts. P is located at the 5th tick after 2, so P = 2 + 5/8 = 2 5/8.
Q2
MCQ
2 marks
🖼 Visual
Visual context
Four figures shown vertically: (1) a trapezium/irregular quadrilateral, (2) a right-pointing arrow shape (pentagon arrow), (3) a slanted parallelogram, and (4) a horizontal rectangle.
Which figure has only 1 line of symmetry?
1. (a trapezium)
2. (a right-pointing arrow / pentagon arrow shape)
3. (a parallelogram)
4. (a rectangle)
Explanation
A right-pointing arrow (pentagon arrow shape) has exactly 1 horizontal line of symmetry. The trapezium shown has 0 lines, the parallelogram has 0 lines, and the rectangle has 2 lines of symmetry.
Q3
MCQ
2 marks
Which of the following is not an equivalent fraction of 2/3?
1. 4/9
2. 8/12
3. 10/15
4. 14/21
Explanation
2/3 = 8/12 = 10/15 = 14/21 (all simplify to 2/3). However 4/9 simplifies to 4/9 (not equal to 2/3). So 4/9 is NOT equivalent to 2/3.
Q4
MCQ
2 marks
🖼 Visual
Visual context
A 3-row by 4-column grid of 12 identical squares forming a rectangle. A checkerboard-like pattern: 4 squares are shaded black (top-left, top-third, middle-second, bottom-left, bottom-third) showing 4 shaded out of 12 total.
The figure is made up of identical squares. How many more squares need to be shaded so that 3/4 of the figure is shaded?
1. 5
2. 7
3. 3
4. 4
Explanation
The figure has 12 identical squares (3 rows × 4 columns). 3/4 of 12 = 9 squares must be shaded. From the figure, 4 squares are already shaded, so 9 − 4 = 5 more squares need to be shaded.
Q5
MCQ
2 marks
🖼 Visual
Visual context
Composite figure made of a horizontal rectangle TUVW on top (UV = 30 cm at top, UT = 9 cm on the left side) joined to a square WXYZ on the lower right. VX = 20 cm marks the full right side. T is on the left, Z lies along TW where the square meets the rectangle's bottom edge, with TZ marked '?' as the unknown length.
The figure is made of square WXYZ and rectangle TUVW. UV = 30 cm, UT = 9 cm and VX = 20 cm. Find the length of TZ.
1. 9 cm
2. 11 cm
3. 19 cm
4. 21 cm
Explanation
Square WXYZ has side = VX − UT = 20 − 9 = 11 cm (so ZW = WX = 11 cm). TW = UV = 30 cm. Therefore TZ = TW − ZW = 30 − 11 = 19 cm.
Q6
Open-ended
2 marks
Arrange the following fractions in increasing order. 3/4 , 1/2 , 5/8
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Q7
Open-ended
2 marks
🖼 Visual
Visual context
A square grid (about 8×7 cells) showing two given line segments meeting at a vertex — one going up-and-slightly-right and the other going right — forming two adjacent sides of the square the student must complete.
Draw a square from the given lines.
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Q8
Open-ended
2 marks
🖼 Visual
Visual context
A square grid (about 8×9) with a horizontal dashed line passing through the middle. Above the dashed line is a partial figure made of line segments: a small triangle/diagonal segment and a short vertical segment. The student must draw the reflection below the dashed line.
Complete the drawing below. The dotted line is a line of symmetry.
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Q9
Open-ended
2 marks
Find the value of 1 − 7/12 − 1/6. Express your answer in the simplest form.
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Q10
Open-ended
2 marks
Mrs Tan had 30 kg of flour. She used 10 kg of flour to make a cake. From the amount of flour left, she gave 1/5 of it to her sister. How much flour did she give to her sister?
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Q11
Structured
3 marks
🖼 Visual
Visual context
A square piece of paper with one corner folded inward, forming a triangular flap. At the bottom-left corner of the square the original 90° corner is divided into three parts: angle x (between the left edge and the fold crease), an angle marked 24° (between the fold crease and the bottom edge of the original square), and the equal-to-x angle on the other side (indicated by tick marks). Tick marks on two of the fold edges indicate that those two segments are equal.
A square piece of paper is folded as shown. Find ∠x.
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Q12
Structured
3 marks
Mary bought a bag of apples. She gave 4/9 of the apples to her uncle and 1/3 of them to her neighbour. In the end, she had 6 apples left. How many apples did Mary have at first?
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Q13
Structured
4 marks
Helen prepared 18 ℓ of orange juice and mango juice in the morning. 5/6 of it was orange juice and the rest was mango juice. Her children drank 7/8 ℓ of mango juice in the afternoon. (a) How much mango juice did Helen prepare? (b) How much mango juice was left?
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