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Cornerstone · Grades 3–5 Keystones #1 4 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 4⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x - 12 = 40

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Share 90 in the ratio 1:2

    Answer: 30 and 60
  5. 5. Statistics Mean

    Find the mean of: 9, 10, 5

    Answer: 8

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