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Mathematics Flashcards

6 cards from real O-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 the interior angle of a regular hexagon?

    Answer: 120°

    Sum of interior angles = (6-2)×180° = 720°. Each angle = 720°÷6 = 120°.

  2. Expand and simplify: (x+3)(x-2)

    Answer: x²+x-6

    (x+3)(x-2) = x²-2x+3x-6 = x²+x-6.

  3. A bag contains 3 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 3/8

    P(red) = 3/(3+5) = 3/8.

  4. What is the HCF of 36 and 48?

    Answer: 12

    Factors of 36: 1,2,3,4,6,9,12,18,36. Factors of 48: 1,2,3,4,6,8,12,16,24,48. HCF = 12.

  5. Simplify: √75

    Answer: 5√3

    √75 = √(25×3) = 5√3.

  6. The price of an item increases from $80 to $92. What is the percentage increase?

    Answer: 15%

    Increase = 12. % increase = (12/80) × 100 = 15%.

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