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Cornerstone · Grades 3–5 Keystones #1 29 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 29 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄3

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x - 7 = 23

    Answer: x = 6
  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

    Divide 156 in the ratio 1:4:1

    Answer: 26, 104 and 26
  5. 5. Statistics Mean

    Find the mean of: 10, 14, 19

    Answer: 14.333333333333

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