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Cornerstone · Grades 3–5 Keystones #1 14 October 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 25

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 52 in the ratio 2:1:1

    Answer: 26, 13 and 13
  5. 5. Statistics Mean

    Find the mean of: 10, 6, 5

    Answer: 7