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Cornerstone · Grades 3–5 Keystones #1 10 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄5

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 78

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 234 in the ratio 1:4:4

    Answer: 26, 104 and 104
  5. 5. Statistics Mean

    Find the mean of: 9, 20, 12, 14, 20

    Answer: 15

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