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Cornerstone · Grades 3–5 Keystones #1 16 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 2⁄6

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

    Solve: 3x + 6 = 18

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 18, 25, 47, 15, 21, 49, 44. Give your answer to 2 decimal places

    Answer: 31.29

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