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Cornerstone · Grades 3–5 Keystones #1 20 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 3⁄4

    Answer: 29⁄28
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 30

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 50 in the ratio 1:3:1

    Answer: 10, 30 and 10
  5. 5. Statistics Mean

    Find the mean of: 17, 14, 8

    Answer: 13

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