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Cornerstone · Grades 3–5 Keystones #1 26 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 26 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 4⁄9

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

    Solve: 7x - 19 = 37

    Answer: x = 8
  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 135 in the ratio 4:1:4

    Answer: 60, 15 and 60
  5. 5. Statistics Mean

    Find the mean of: 10, 2, 19, 11

    Answer: 10.5

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