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Cornerstone · Grades 3–5 Keystones #1 15 December 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 15 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: 3x - 13 = 23

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 15cm

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 3:2:3

    Answer: 54, 36 and 54
  5. 5. Statistics Mean

    Find the mean of: 18, 7, 9, 19, 5

    Answer: 11.6

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