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Cornerstone · Grades 3–5 Keystones #1 24 January 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 24 January 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 4⁄5

    Answer: 48⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 39

    Answer: x = 13
  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 100 in the ratio 1:1:3

    Answer: 20, 20 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 35, 33, 31, 32, 10, 43, 28, 37. Give your answer to 2 decimal places

    Answer: 31.13

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