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Cornerstone · Grades 3–5 Keystones #1 22 June 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 1⁄10

    Answer: 1⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 23

    Answer: x = 3
  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 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics Mean

    Find the mean of: 4, 23, 12, 15, 16

    Answer: 14

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