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Cornerstone · Grades 3–5 Keystones #1 26 December 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 26 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 2⁄3

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 24

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

    Calculate the hypotenuse when a = 11cm and b = 5cm

    Answer: 12.08cm
  4. 4. Ratio Sharing in a ratio

    Divide 190 in the ratio 3:4:3

    Answer: 57, 76 and 57
  5. 5. Statistics Mean

    Find the mean of: 5, 18, 16, 15, 11

    Answer: 13

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