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Cornerstone · Grades 3–5 Keystones #1 9 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 7⁄8

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 45

    Answer: x = 7
  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 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics Mean

    Find the mean of: 7, 3, 11

    Answer: 7

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