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Cornerstone · Grades 3–5 Keystones #1 23 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄4

    Answer: 13⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 57

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

    Calculate the hypotenuse when a = 5cm and b = 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 3:2:3

    Answer: 60, 40 and 60
  5. 5. Statistics Mean

    Find the mean of: 9, 10, 18, 12, 16

    Answer: 13

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