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Cornerstone · Grades 3–5 Keystones #1 20 November 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 20 November 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 17

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 198 in the ratio 4:3:4

    Answer: 72, 54 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 6, 10, 47, 8, 26, 50, 32. Give your answer to 2 decimal places

    Answer: 25.57

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