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Cornerstone · Grades 3–5 Keystones #1 17 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 4

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 3:1:3

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

    Calculate the mean of: 11, 20, 25, 30, 27, 43, 8, 30

    Answer: 24.25

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