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Cornerstone · Grades 3–5 Keystones #1 9 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 4⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 12

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 78 in the ratio 1:2

    Answer: 26 and 52
  5. 5. Statistics Mean

    Find the mean of: 17, 5, 17

    Answer: 13

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