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Cornerstone · Grades 3–5 Keystones #1 21 December 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄7

    Answer: 19⁄42
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 78

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

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

    Share 120 in the ratio 2:1

    Answer: 80 and 40
  5. 5. Statistics Mean

    Find the mean of: 17, 7, 19, 5

    Answer: 12

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