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Cornerstone · Grades 3–5 Keystones #1 23 January 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 5⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 6

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 2:3:3

    Answer: 60, 90 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 43, 40, 34, 45, 9, 46. Give your answer to 2 decimal places

    Answer: 36.17

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