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Cornerstone · Grades 3–5 Keystones #1 25 November 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄7

    Answer: 37⁄28
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 58

    Answer: x = 8
  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 80 in the ratio 2:3

    Answer: 32 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 10, 39, 29, 7, 7, 21. Give your answer to 2 decimal places

    Answer: 18.83

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