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Cornerstone · Grades 3–5 Keystones #1 6 July 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 6 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 1⁄11

    Answer: 7⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x + 12 = 24

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 2:3:3

    Answer: 32, 48 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 11, 33, 30, 30, 17, 35, 20. Give your answer to 2 decimal places

    Answer: 25.14

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