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Cornerstone · Grades 3–5 Keystones #1 17 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 17 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x - 11 = 45

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 98 in the ratio 3:4

    Answer: 42 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 24, 26, 21, 27, 34, 21, 49, 18

    Answer: 27.5

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