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Cornerstone · Grades 3–5 Keystones #1 30 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 30 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 8

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 2:3:2

    Answer: 22, 33 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 8, 9, 15, 34, 21, 47, 5. Give your answer to 2 decimal places

    Answer: 19.86

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