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Cornerstone · Grades 3–5 Keystones #1 12 December 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 4⁄8

    Answer: 2⁄3
  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 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Find the mean of: 15, 16, 8, 19, 17

    Answer: 15

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