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Cornerstone · Grades 3–5 Keystones #1 17 February 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 February 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄11 + 1⁄11

    Answer: 5⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 27

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 2:3

    Answer: 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 20, 50, 32, 32, 19, 44, 47. Give your answer to 2 decimal places

    Answer: 34.86

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