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Cornerstone · Grades 3–5 Keystones #1 10 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 64

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 9, 7, 2, 10

    Answer: 7

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