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

Five GCSE retrieval questions · 1 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 4⁄5

    Answer: 22⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 22

    Answer: x = 3
  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 40 in the ratio 2:1:1

    Answer: 20, 10 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 39, 17, 5, 40, 7, 24

    Answer: 22

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