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

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 55

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 2:3:4

    Answer: 48, 72 and 96
  5. 5. Statistics Mean

    Calculate the mean of: 35, 27, 44, 11, 41, 21, 18

    Answer: 28.1

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