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Cornerstone · Grades 3–5 Keystones #1 2 February 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 60

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 1:1:2

    Answer: 34, 34 and 68
  5. 5. Statistics Mean

    Find the mean of: 12, 16, 17

    Answer: 15

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