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Cornerstone · Grades 3–5 Keystones #1 30 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x - 10 = 40

    Answer: x = 10
  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

    Share 66 in the ratio 1:2

    Answer: 22 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 31, 17, 44, 22, 45, 33, 41, 43

    Answer: 34.5

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