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Cornerstone · Grades 3–5 Keystones #1 23 December 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 23 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 5x - 11 = 24

    Answer: x = 7
  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 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 16, 36, 41, 42, 48, 11, 31, 36. Give your answer to 2 decimal places

    Answer: 32.63

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