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Cornerstone · Grades 3–5 Keystones #1 26 July 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 26 July 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄5

    Answer: 19⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x + 4 = 81

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:2

    Answer: 30 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 12, 44, 37, 25, 32, 20, 33

    Answer: 29

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