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Cornerstone · Grades 3–5 Keystones #1 25 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄5

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

    Solve: 4x + 10 = 22

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

    Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 1:2

    Answer: 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 35, 31, 39, 47, 40, 48, 27, 38. Give your answer to 2 decimal places

    Answer: 38.13

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