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Cornerstone · Grades 3–5 Keystones #1 28 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 28 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x + 4 = 36

    Answer: x = 8
  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

    Share 57 in the ratio 2:1

    Answer: 38 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 33, 10, 12, 27, 15, 7, 21

    Answer: 17.9

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