PSLE Mathematics Concepts 4

Question 1

What is the net of a cube made up of?

Accepted Answer

6 squares

Answer

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?

Accepted Answer

15

Answer

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?

Accepted Answer

180°

Answer

The three interior angles of any triangle always add up to 180°.

Question 4

Simplify the ratio 36:48.

Accepted Answer

3:4

Answer

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?

Accepted Answer

125 cm³

Answer

Volume of a cube = side³ = 5³ = 5 × 5 × 5 = 125 cm³.

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