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Cornerstone · Grades 3–5 Keystones #1 31 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 31 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 4x + 15 = 27

    Answer: x = 3
  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 96 in the ratio 4:3:1

    Answer: 48, 36 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 42, 28, 35, 18, 18, 29, 5, 16

    Answer: 23.9

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