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Cornerstone · Grades 3–5 Keystones #1 23 August 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 23 August 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 9 = 21

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:1:2

    Answer: 48, 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 4, 6, 13, 19, 2

    Answer: 8.8

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