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Cornerstone · Grades 3–5 Keystones #1 24 February 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 49

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 4:1:1

    Answer: 64, 16 and 16
  5. 5. Statistics Mean

    Find the mean of: 3, 17, 19

    Answer: 13

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