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Mathematics Concepts Flashcards

6 cards from real PSLE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the highest common factor (HCF) of 24 and 36?

    Answer: 12

    Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24. Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36. HCF = 12.

  2. What type of angle measures exactly 90°?

    Answer: Right angle

    A right angle measures exactly 90°. Acute is less than 90°, obtuse is between 90° and 180°.

  3. What is 2/3 + 1/4?

    Answer: 11/12

    LCD of 3 and 4 is 12. 2/3 = 8/12 and 1/4 = 3/12. 8/12 + 3/12 = 11/12.

  4. How many faces does a triangular prism have?

    Answer: 5

    A triangular prism has 5 faces: 2 triangular faces and 3 rectangular faces.

  5. Which number is a prime number?

    Answer: 23

    23 is prime because it has only two factors: 1 and 23. The others are divisible by 3.

  6. What is 3/5 of 450?

    Answer: 270

    3/5 × 450 = (3 × 450) ÷ 5 = 1,350 ÷ 5 = 270.

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