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Cornerstone · Grades 3–5 Keystones #1 27 May 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 5⁄6

    Answer: 43⁄30
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 39

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 300 in the ratio 3:4:3

    Answer: 90, 120 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 48, 47, 35, 9, 48, 16, 48. Give your answer to 2 decimal places

    Answer: 35.86

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