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Cornerstone · Grades 3–5 Keystones #1 16 October 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 2⁄5

    Answer: 39⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 29

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 1:3:1

    Answer: 28, 84 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 31, 19, 15, 17, 9, 10, 20, 29

    Answer: 18.75

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