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Cornerstone · Grades 3–5 Keystones #1 22 May 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 29

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 35, 23, 28, 41, 22, 6, 39. Give your answer to 2 decimal places

    Answer: 27.71

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