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

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 71

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:1:2

    Answer: 20, 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 38, 18, 29, 46, 30, 45, 33. Give your answer to 2 decimal places

    Answer: 34.14

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