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Cornerstone · Grades 3–5 Keystones #1 20 June 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 June 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄3

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 16 = 62

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 15cm

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

    Divide 72 in the ratio 3:1:2

    Answer: 36, 12 and 24
  5. 5. Statistics Mean

    Find the mean of: 2, 3, 20, 15

    Answer: 10

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