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Cornerstone · Grades 3–5 Keystones #1 13 February 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄7

    Answer: 23⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 53

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:1

    Answer: 21, 42 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 47, 33, 40, 45, 29, 50, 11, 40

    Answer: 36.9

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