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Cornerstone · Grades 3–5 Keystones #1 15 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 15 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 1⁄3

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 37

    Answer: x = 8
  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

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics Mean

    Find the mean of: 12, 12, 24, 12

    Answer: 15

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