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Cornerstone · Grades 3–5 Keystones #1 12 April 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 12 April 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

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

    Solve: 8x - 12 = 108

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 2:1:2

    Answer: 40, 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 13, 35, 40, 9, 18, 23

    Answer: 23

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