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Cornerstone · Grades 3–5 Keystones #1 2 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄5

    Answer: 43⁄40
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 27

    Answer: x = 9
  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

    Divide 100 in the ratio 1:2:2

    Answer: 20, 40 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 5, 41, 29, 40, 34, 21, 49. Give your answer to 2 decimal places

    Answer: 31.29

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