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Cornerstone · Grades 3–5 Keystones #1 29 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 6⁄7

    Answer: 43⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 24

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 4:1

    Answer: 72 and 18
  5. 5. Statistics Mean

    Find the mean of: 7, 4, 10, 19

    Answer: 10

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