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Cornerstone · Grades 3–5 Keystones #1 4 July 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 July 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 3⁄7

    Answer: 25⁄42
  2. 2. Algebra Two-step equations

    Solve: 7x - 5 = 79

    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

    Divide 143 in the ratio 3:4:4

    Answer: 39, 52 and 52
  5. 5. Statistics Mean

    Find the mean of: 15, 5, 20, 8

    Answer: 12

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