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Cornerstone · Grades 3–5 Keystones #1 10 July 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄5

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 53

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

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 1:3:3

    Answer: 28, 84 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 11, 32, 10, 38, 46, 5, 34, 28

    Answer: 25.5

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