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Cornerstone · Grades 3–5 Keystones #1 5 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 3⁄7

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 29

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 2:1:2

    Answer: 52, 26 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 10, 24, 8, 37, 42, 9

    Answer: 21.7

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