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Cornerstone · Grades 3–5 Keystones #1 15 August 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 August 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄3

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x - 12 = 53

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 78 in the ratio 2:1

    Answer: 52 and 26
  5. 5. Statistics Mean

    Find the mean of: 19, 9, 12, 10, 7

    Answer: 11.4

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