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Cornerstone · Grades 3–5 Keystones #1 18 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 18 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 6 = 36

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 57 in the ratio 2:1

    Answer: 38 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 25, 29, 47, 15, 24, 7, 21, 34

    Answer: 25.3

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