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Cornerstone · Grades 3–5 Keystones #1 28 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 28 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 55

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 4:1

    Answer: 40 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 16, 9, 41, 32, 30, 41. Give your answer to 2 decimal places

    Answer: 28.17

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