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

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 4⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 13

    Answer: x = 7
  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 72 in the ratio 2:1

    Answer: 48 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 42, 32, 34, 50, 14, 31, 42

    Answer: 35

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