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Cornerstone · Grades 3–5 Keystones #1 12 December 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 December 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 722 + 736

    Answer: 722 + 736 = 1458
  2. 2. Algebra

    Factorise: 2x² + 8x

    Answer: 2x(x + 4)
  3. 3. Geometry

    Opposite = 5cm, hypotenuse = 7.cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify the ratio 24:6

    Answer: 4:1
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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