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Cornerstone · Grades 3–5 Keystones #1 15 January 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 15 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 16 = 54

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 3:1:2

    Answer: 33, 11 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 26, 9, 23, 42, 40, 15, 27

    Answer: 26

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