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Cornerstone · Grades 3–5 Keystones #1 2 October 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 8 = 82

    Answer: x = 15
  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 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 50, 29, 26, 9, 24, 47. Give your answer to 2 decimal places

    Answer: 30.83

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