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

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 77

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Divide 170 in the ratio 4:3:3

    Answer: 68, 51 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 10, 18, 37, 20, 18, 44, 39

    Answer: 26.6

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