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Cornerstone · Grades 3–5 Keystones #1 19 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 19 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄12 + 2⁄12

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

    Solve: 3x - 14 = 22

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 3:3:4

    Answer: 36, 36 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 23, 29, 26, 22, 28, 21, 25, 23. Give your answer to 2 decimal places

    Answer: 24.63

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