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Cornerstone · Grades 3–5 Keystones #1 17 February 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄7

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 8x - 20 = 60

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 56 in the ratio 3:1

    Answer: 42 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 48, 10, 17, 36, 26, 19, 45. Give your answer to 2 decimal places

    Answer: 28.71

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