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Cornerstone · Grades 3–5 Keystones #1 6 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 22

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 4:1:4

    Answer: 64, 16 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 36, 35, 44, 29, 9, 41, 8. Give your answer to 2 decimal places

    Answer: 28.86

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