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Cornerstone · Grades 3–5 Keystones #1 3 November 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 12

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 3:2

    Answer: 18 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 37, 30, 5, 42, 23, 48, 22. Give your answer to 2 decimal places

    Answer: 29.57

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