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Cornerstone · Grades 3–5 Keystones #1 26 February 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 26 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 3⁄7

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

    Solve: 2x + 5 = 27

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 3:2:1

    Answer: 39, 26 and 13
  5. 5. Statistics Mean

    Find the mean of: 3, 16, 10, 18, 13

    Answer: 12

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