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Cornerstone · Grades 3–5 Keystones #1 5 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 4⁄6

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 4

    Answer: x = 4
  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 140 in the ratio 2:3:2

    Answer: 40, 60 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 6, 38, 30, 22, 6, 15, 45, 47. Give your answer to 2 decimal places

    Answer: 26.13

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