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Cornerstone · Grades 3–5 Keystones #1 15 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 63

    Answer: x = 12
  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

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 34, 49, 15, 17, 30, 23

    Answer: 28

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