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Cornerstone · Grades 3–5 Keystones #1 8 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 3⁄4

    Answer: 45⁄28
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 71

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

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

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

    Divide 162 in the ratio 3:4:2

    Answer: 54, 72 and 36
  5. 5. Statistics Mean

    Find the mean of: 11, 11, 7

    Answer: 9.6666666666667

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