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

Five GCSE retrieval questions · 7 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄3

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 21

    Answer: x = 7
  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 56 in the ratio 1:3

    Answer: 14 and 42
  5. 5. Statistics Mean

    Find the mean of: 4, 11, 12

    Answer: 9

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