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Cornerstone · Grades 3–5 Keystones #1 21 July 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 21 July 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 5⁄6

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

    Solve: 3x + 11 = 29

    Answer: x = 6
  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 184 in the ratio 3:4:1

    Answer: 69, 92 and 23
  5. 5. Statistics Mean

    Find the mean of: 17, 13, 16, 15, 18

    Answer: 15.8

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