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Cornerstone · Grades 3–5 Keystones #1 28 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 28 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 25

    Answer: x = 9
  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 297 in the ratio 4:4:3

    Answer: 108, 108 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 34, 36, 46, 50, 22, 5, 8

    Answer: 28.7

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