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Cornerstone · Grades 3–5 Keystones #1 14 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 14 = 62

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 3:3:2

    Answer: 36, 36 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 31, 21, 46, 31, 20, 24, 38. Give your answer to 2 decimal places

    Answer: 30.14

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