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Cornerstone · Grades 3–5 Keystones #1 21 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 21 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 3⁄5

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 6

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 1:3:2

    Answer: 10, 30 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 40, 36, 50, 38, 26, 42, 33. Give your answer to 2 decimal places

    Answer: 37.86

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