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Cornerstone · Grades 3–5 Keystones #1 15 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 15 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 4⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 4 = 14

    Answer: x = 5
  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

    Divide 77 in the ratio 2:2:3

    Answer: 22, 22 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 25, 32, 17, 21, 19, 5

    Answer: 19.8

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