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Cornerstone · Grades 3–5 Keystones #1 13 January 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄5

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 91

    Answer: x = 11
  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 77 in the ratio 3:4

    Answer: 33 and 44
  5. 5. Statistics Mean

    Find the mean of: 13, 17, 5, 11, 9

    Answer: 11

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