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Mathematics Flashcards

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

Read the first 6 Mathematics flashcards as text

  1. Factorise: 6x + 9

    Answer: 3(2x + 3)

    The HCF of 6x and 9 is 3. Factor out 3: 6x + 9 = 3(2x + 3).

  2. A map has scale 1:25000. A distance of 8 cm on the map represents how many km?

    Answer: 2 km

    8 cm × 25000 = 200000 cm = 2000 m = 2 km.

  3. What is the gradient of the line y = 3x - 5?

    Answer: 3

    In the equation y = mx + c, the gradient is m. Here y = 3x - 5, so the gradient is 3.

  4. Calculate: 3² + 4²

    Answer: 25

    3² + 4² = 9 + 16 = 25. (Note: this is also 5², consistent with the 3-4-5 Pythagorean triple.)

  5. A shirt costs $45. It is sold at a 10% profit. What is the selling price?

    Answer: $49.50

    Profit = 10% of $45 = $4.50. Selling price = $45 + $4.50 = $49.50.

  6. How many lines of symmetry does an equilateral triangle have?

    Answer: 3

    An equilateral triangle has 3 lines of symmetry, one from each vertex to the midpoint of the opposite side.

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  1. go.gov.sg — Eligibility, fees, test delivery, time limit · verified Oct 2026
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