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Cornerstone · Grades 3–5 Keystones #1 2 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 1⁄3

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 8 = 104

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

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

    Divide 161 in the ratio 2:1:4

    Answer: 46, 23 and 92
  5. 5. Statistics Mean

    Find the mean of: 9, 10, 6, 12, 18

    Answer: 11