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Cornerstone · Grades 3–5 Keystones #1 19 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 73

    Answer: x = 13
  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 150 in the ratio 3:4:3

    Answer: 45, 60 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 42, 44, 35, 41, 49, 29, 33

    Answer: 39

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