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Cornerstone · Grades 3–5 Keystones #1 3 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 3 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 1⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 30

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.56cm
  4. 4. Ratio Sharing in a ratio

    Share 56 in the ratio 1:3

    Answer: 14 and 42
  5. 5. Statistics Mean

    Find the mean of: 4, 9, 6, 5, 16

    Answer: 8

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