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Cornerstone · Grades 3–5 Keystones #1 23 September 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄7

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 4 = 32

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 1:2:1

    Answer: 40, 80 and 40
  5. 5. Statistics Mean

    Find the mean of: 8, 20, 7, 5

    Answer: 10