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Cornerstone · Grades 3–5 Keystones #1 19 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 2⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 15

    Answer: x = 3
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 9cm

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Divide 260 in the ratio 2:2:1

    Answer: 104, 104 and 52
  5. 5. Statistics Mean

    Find the mean of: 20, 4, 17, 2

    Answer: 10.75

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