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Cornerstone · Grades 3–5 Keystones #1 21 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄6

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 8 = 24

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 3:2

    Answer: 36 and 24
  5. 5. Statistics Mean

    Find the mean of: 19, 6, 18, 9

    Answer: 13

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