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Cornerstone · Grades 3–5 Keystones #1 11 February 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 11 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 1⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 4

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 3:4

    Answer: 36 and 48
  5. 5. Statistics Mean

    Find the mean of: 16, 5, 6

    Answer: 9

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