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Cornerstone · Grades 3–5 Keystones #1 13 May 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 13 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 14 = -4

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 2:1:1

    Answer: 42, 21 and 21
  5. 5. Statistics Mean

    Find the mean of: 3, 10, 13

    Answer: 8.6666666666667

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