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Cornerstone · Grades 3–5 Keystones #1 26 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄4

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 40

    Answer: x = 5
  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 95 in the ratio 1:4

    Answer: 19 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 10, 43, 31, 31, 45, 43, 20, 27

    Answer: 31.25

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