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Cornerstone · Grades 3–5 Keystones #1 11 January 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 11 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 2⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 11 = 25

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 39, 8, 20, 31, 12, 38, 28, 17. Give your answer to 2 decimal places

    Answer: 24.13

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