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Cornerstone · Grades 3–5 Keystones #1 8 February 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 1⁄7

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

    Solve: 6x - 20 = 28

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 1:4

    Answer: 15 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 42, 50, 39, 7, 19, 7, 42

    Answer: 29.4

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