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Cornerstone · Grades 3–5 Keystones #1 30 September 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 30 September 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄5

    Answer: 21⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 12

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 1:4:4

    Answer: 18, 72 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 31, 31, 30, 24, 50, 5, 34, 8. Give your answer to 2 decimal places

    Answer: 26.63

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