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Cornerstone · Grades 3–5 Keystones #1 31 October 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 October 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 4⁄7

    Answer: 27⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 36

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 1:2

    Answer: 11 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 35, 48, 27, 32, 45, 30, 39, 12

    Answer: 33.5

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