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Cornerstone · Grades 3–5 Keystones #1 22 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 22 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 6⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 78

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 26, 16, 39, 33, 35, 10

    Answer: 26.5

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