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Cornerstone · Grades 3–5 Keystones #1 19 February 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 19 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 2⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 43

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 2:3

    Answer: 34 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 9, 28, 44, 11, 13, 7, 39

    Answer: 21.6

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