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Cornerstone · Grades 3–5 Keystones #1 13 August 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 13 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 39

    Answer: x = 8
  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 232 in the ratio 3:4:1

    Answer: 87, 116 and 29
  5. 5. Statistics Mean

    Calculate the mean of: 41, 34, 16, 29, 35, 29, 46, 31. Give your answer to 2 decimal places

    Answer: 32.63

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