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Cornerstone · Grades 3–5 Keystones #1 31 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 31 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄5

    Answer: 32⁄35
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 23

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 13cm

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 3:4:2

    Answer: 45, 60 and 30
  5. 5. Statistics Mean

    Find the mean of: 2, 9, 18

    Answer: 9.6666666666667

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