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Cornerstone · Grades 3–5 Keystones #1 20 April 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 April 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x - 8 = 52

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

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 126 in the ratio 4:3

    Answer: 72 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 42, 42, 43, 41, 10, 47, 31. Give your answer to 2 decimal places

    Answer: 36.57

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