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

  1. 1. Number Adding fractions

    Add: 6⁄8 + 1⁄4

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 94

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 2:3:3

    Answer: 34, 51 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 24, 31, 5, 49, 35, 45, 17, 10

    Answer: 27

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