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Cornerstone · Grades 3–5 Keystones #1 23 August 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄7

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 54

    Answer: x = 6
  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

    Share 112 in the ratio 4:3

    Answer: 64 and 48
  5. 5. Statistics Mean

    Find the mean of: 1, 9, 14

    Answer: 8

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