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Cornerstone · Grades 3–5 Keystones #1 28 July 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 28 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x - 16 = -6

    Answer: x = 5
  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 125 in the ratio 3:1:1

    Answer: 75, 25 and 25
  5. 5. Statistics Mean

    Find the mean of: 20, 11, 18, 5, 13

    Answer: 13.4

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