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Cornerstone · Grades 3–5 Keystones #1 21 June 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄8 + 1⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 8x - 14 = 50

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 7cm

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 1:3:3

    Answer: 13, 39 and 39
  5. 5. Statistics Mean

    Find the mean of: 14, 16, 2, 18

    Answer: 12.5

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