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Cornerstone · Grades 3–5 Keystones #1 25 July 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 25 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 3⁄9

    Answer: 5⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 5 = 23

    Answer: x = 6
  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 28 in the ratio 1:3

    Answer: 7 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 49, 8, 48, 9, 10, 8

    Answer: 22

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