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

Five GCSE retrieval questions · 3 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 13 = 35

    Answer: x = 8
  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

    Divide 168 in the ratio 3:1:4

    Answer: 63, 21 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 45, 23, 15, 28, 32, 44, 11. Give your answer to 2 decimal places

    Answer: 28.29

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