PSLE Mathematics Concepts 4 — Questions and Answers
Question 1: What is the net of a cube made up of?
- 4 squares
- 5 squares
- 6 squares (Correct answer)
- 8 squares
Correct answer: 6 squares
A cube has 6 faces, so its net is made up of 6 squares arranged in a cross or T-shape pattern.
Question 2: Which of the following is a composite number?
- 11
- 13
- 15 (Correct answer)
- 17
Correct answer: 15
15 is composite because it has factors other than 1 and itself (3 × 5 = 15). The others are prime.
Question 3: What is the sum of interior angles of a triangle?
- 90°
- 180° (Correct answer)
- 270°
- 360°
Correct answer: 180°
The three interior angles of any triangle always add up to 180°.
Question 4: Simplify the ratio 36:48.
- 3:4 (Correct answer)
- 6:8
- 9:12
- 4:3
Correct answer: 3:4
Divide both by HCF (12): 36 ÷ 12 = 3, 48 ÷ 12 = 4. Simplified ratio is 3:4.
Question 5: What is the volume of a cube with side length 5 cm?
- 25 cm³
- 125 cm³ (Correct answer)
- 150 cm³
- 75 cm³
Correct answer: 125 cm³
Volume of a cube = side³ = 5³ = 5 × 5 × 5 = 125 cm³.
Question 6: Convert 2 3/5 to an improper fraction.
- 8/5
- 11/5
- 13/5 (Correct answer)
- 15/5
Correct answer: 13/5
2 3/5 = (2 × 5 + 3)/5 = 13/5.
PSLE Mathematics Concepts 4
What is the net of a cube made up of?