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

Five GCSE retrieval questions · 5 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 6⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x + 12 = 24

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 1:3:2

    Answer: 13, 39 and 26
  5. 5. Statistics Mean

    Find the mean of: 25, 7, 15, 4, 4

    Answer: 11

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