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Cornerstone · Grades 3–5 Keystones #1 23 October 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄3

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 27

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Find the mean of: 19, 14, 14

    Answer: 15.666666666667

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