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Cornerstone · Grades 3–5 Keystones #1 9 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄5

    Answer: 22⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x - 15 = 45

    Answer: x = 15
  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

    Divide 108 in the ratio 3:2:4

    Answer: 36, 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 13, 3, 20

    Answer: 12

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