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Cornerstone · Grades 3–5 Keystones #1 18 September 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 18 September 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄8 + 1⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 0

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 34, 33, 44, 29, 25, 8, 43. Give your answer to 2 decimal places

    Answer: 30.86

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