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Cornerstone · Grades 3–5 Keystones #1 7 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 7 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄6

    Answer: 29⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 34

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

    Calculate the hypotenuse when a = 4cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Find the mean of: 15, 21, 6, 16, 12

    Answer: 14

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