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Cornerstone · Grades 3–5 Keystones #1 28 April 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 28 April 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 1⁄12

    Answer: 1⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 57

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 2:3

    Answer: 26 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 36, 47, 8, 23, 49, 5, 47. Give your answer to 2 decimal places

    Answer: 30.71

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