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Cornerstone · Grades 3–5 Keystones #1 17 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 17 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 1⁄10

    Answer: 3⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 41

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 3:2

    Answer: 21 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 48, 25, 30, 41, 19, 6, 31, 19

    Answer: 27.4

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