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Cornerstone · Grades 3–5 Keystones #1 30 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 30 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 7x - 18 = 73

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 4cm

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 2:3:3

    Answer: 52, 78 and 78
  5. 5. Statistics Mean

    Find the mean of: 8, 10, 19

    Answer: 12.333333333333

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