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

  1. 1. Number Adding fractions

    Add: 2⁄8 + 2⁄5

    Answer: 13⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 52

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Divide 132 in the ratio 4:1:1

    Answer: 88, 22 and 22
  5. 5. Statistics Mean

    Find the mean of: 16, 4, 5, 15

    Answer: 10

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