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Cornerstone · Grades 3–5 Keystones #1 22 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 22 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 3⁄11

    Answer: 6⁄11
  2. 2. Algebra Two-step equations

    Solve: 8x - 12 = 36

    Answer: x = 6
  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 270 in the ratio 2:3:4

    Answer: 60, 90 and 120
  5. 5. Statistics Mean

    Calculate the mean of: 42, 10, 7, 23, 21, 38

    Answer: 23.5

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