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Cornerstone · Grades 3–5 Keystones #1 29 January 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 29 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 5x + 3 = 58

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 11cm

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Share 95 in the ratio 2:3

    Answer: 38 and 57
  5. 5. Statistics Mean

    Find the mean of: 3, 18, 15, 13

    Answer: 12.25

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