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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. What is 15 + 27?

    Answer: 42

    15 + 27 = 42. Add the units: 5+7=12 (write 2, carry 1). Add the tens: 1+2+1=4. Answer: 42.

  2. Solve: 3x = 18

    Answer: x = 6

    Divide both sides by 3: x = 18 ÷ 3 = 6.

  3. What is 20% of 150?

    Answer: 30

    20% of 150 = (20/100) × 150 = 0.2 × 150 = 30.

  4. A rectangle has length 8 cm and width 4 cm. What is its perimeter?

    Answer: 24 cm

    Perimeter = 2(l + w) = 2(8 + 4) = 2 × 12 = 24 cm.

  5. Simplify: 3x + 5x - 2x

    Answer: 6x

    Collect like terms: 3x + 5x - 2x = (3+5-2)x = 6x.

  6. What is the area of a triangle with base 10 cm and height 6 cm?

    Answer: 30 cm²

    Area of triangle = ½ × base × height = ½ × 10 × 6 = 30 cm².

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  1. go.gov.sg — Eligibility, fees, test delivery, time limit · verified Oct 2026
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  3. seab.gov.sg — Score release, passing score · verified Oct 2026