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Cornerstone · Grades 3–5 Keystones #1 21 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄5

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 2x - 14 = 6

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:4:1

    Answer: 36, 72 and 18
  5. 5. Statistics Mean

    Find the mean of: 6, 3, 25, 6

    Answer: 10

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