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Cornerstone · Grades 3–5 Keystones #1 28 August 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 28 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 1⁄5

    Answer: 23⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x - 14 = 46

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 16.64cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 4:3:3

    Answer: 72, 54 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 8, 5, 32, 47, 17, 50

    Answer: 26.5

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