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

Five GCSE retrieval questions · 7 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄8

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 43

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:3

    Answer: 20 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 24, 46, 23, 18, 32, 13, 39. Give your answer to 2 decimal places

    Answer: 27.86

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