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Cornerstone · Grades 3–5 Keystones #1 31 January 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 January 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄6

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x - 17 = 28

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 280 in the ratio 1:2:2

    Answer: 56, 112 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 7, 18, 23, 40, 10, 8, 18

    Answer: 17.7

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