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Cornerstone · Grades 3–5 Keystones #1 1 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄7

    Answer: 41⁄42
  2. 2. Algebra Two-step equations

    Solve: 2x - 16 = -6

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 1:2:2

    Answer: 27, 54 and 54
  5. 5. Statistics Mean

    Find the mean of: 9, 8, 14, 17

    Answer: 12

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