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Cornerstone · Grades 3–5 Keystones #1 19 May 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 19 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

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

    Solve: 5x + 9 = 34

    Answer: x = 5
  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 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 2, 15, 18

    Answer: 11.666666666667

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