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Cornerstone · Grades 3–5 Keystones #1 28 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 28 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 6⁄8

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 2x + 10 = 16

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

    Calculate the hypotenuse when a = 5cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 2:1

    Answer: 22 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 23, 42, 49, 12, 27, 33, 7. Give your answer to 2 decimal places

    Answer: 27.57

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