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Cornerstone · Grades 3–5 Keystones #1 12 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 7⁄8

    Answer: 43⁄40
  2. 2. Algebra Two-step equations

    Solve: 2x - 9 = 17

    Answer: x = 13
  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 200 in the ratio 3:3:4

    Answer: 60, 60 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 16, 49, 35, 5, 50, 19

    Answer: 29

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