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Cornerstone · Grades 3–5 Keystones #1 21 February 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 21 February 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 1⁄11

    Answer: 3⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 34

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 156 in the ratio 1:4:1

    Answer: 26, 104 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 42, 41, 13, 32, 23, 42

    Answer: 32.2

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