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Cornerstone · Grades 3–5 Keystones #1 6 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 6 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 79

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Divide 225 in the ratio 1:4:4

    Answer: 25, 100 and 100
  5. 5. Statistics Mean

    Find the mean of: 9, 17, 13

    Answer: 13

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