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Cornerstone · Grades 3–5 Keystones #1 26 January 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 26 January 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 50

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:4:3

    Answer: 28, 56 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 11, 13, 33, 7, 10, 5

    Answer: 13.2

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