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Cornerstone · Grades 3–5 Keystones #1 25 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄11 + 3⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 17 = 35

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 99 in the ratio 2:4:3

    Answer: 22, 44 and 33
  5. 5. Statistics Mean

    Find the mean of: 6, 9, 19, 6

    Answer: 10

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