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Cornerstone · Grades 3–5 Keystones #1 15 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 15 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 0

    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

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 41, 7, 24, 25, 50, 46, 25

    Answer: 31.1

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