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Cornerstone · Grades 3–5 Keystones #1 20 November 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄7

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 52

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 2:3:2

    Answer: 26, 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 22, 25, 25, 12, 32, 41, 13, 44

    Answer: 26.75

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