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Cornerstone · Grades 3–5 Keystones #1 20 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 20 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 1⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 34

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

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 4:3

    Answer: 60 and 45
  5. 5. Statistics Mean

    Find the mean of: 12, 9, 18

    Answer: 13

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