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

Five GCSE retrieval questions · 1 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 2⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 15

    Answer: x = 8
  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 120 in the ratio 3:3:4

    Answer: 36, 36 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 17, 6, 45, 25, 36, 28, 25

    Answer: 26

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