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Cornerstone · Grades 3–5 Keystones #1 26 November 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 26 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 4⁄5

    Answer: 49⁄30
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 21

    Answer: x = 4
  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

    Divide 144 in the ratio 2:1:1

    Answer: 72, 36 and 36
  5. 5. Statistics Mean

    Find the mean of: 10, 17, 2, 11, 10

    Answer: 10

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