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Cornerstone · Grades 3–5 Keystones #1 23 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄4

    Answer: 37⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x - 9 = 40

    Answer: x = 7
  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 147 in the ratio 4:2:1

    Answer: 84, 42 and 21
  5. 5. Statistics Mean

    Find the mean of: 12, 8, 17, 15

    Answer: 13

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