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Cornerstone · Grades 3–5 Keystones #1 22 February 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄3

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x - 6 = 24

    Answer: x = 15
  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 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 24, 2, 13, 17

    Answer: 14

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