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Cornerstone · Grades 3–5 Keystones #1 25 December 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 25 December 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 27

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

    Calculate the hypotenuse when a = 5cm and b = 5cm

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 20, 13, 21, 39, 25, 33

    Answer: 25.2

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