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Cornerstone · Grades 3–5 Keystones #1 31 January 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 31 January 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 3⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 12

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 3:4:1

    Answer: 30, 40 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 6, 40, 42, 21, 7, 6, 27. Give your answer to 2 decimal places

    Answer: 21.29

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