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Cornerstone · Grades 3–5 Keystones #1 30 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 2⁄3

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 25

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 1:1:3

    Answer: 18, 18 and 54
  5. 5. Statistics Mean

    Find the mean of: 7, 20, 9

    Answer: 12