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Cornerstone · Grades 3–5 Keystones #1 22 October 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 19 = 26

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 18 in the ratio 1:2

    Answer: 6 and 12
  5. 5. Statistics Mean

    Find the mean of: 16, 21, 5

    Answer: 14

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