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Cornerstone · Grades 3–5 Keystones #1 31 May 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄3

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 19 = 61

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

    Calculate the hypotenuse when a = 5cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 2:1:1

    Answer: 72, 36 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 38, 33, 7, 21, 28, 5, 45. Give your answer to 2 decimal places

    Answer: 25.29

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