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Cornerstone · Grades 3–5 Keystones #1 10 December 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 10 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 5⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 45

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  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, 20, 31, 30, 15, 5, 25, 7

    Answer: 17.75

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