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Cornerstone · Grades 3–5 Keystones #1 19 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 19 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 11 = 59

    Answer: x = 8
  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 192 in the ratio 3:1:4

    Answer: 72, 24 and 96
  5. 5. Statistics Mean

    Calculate the mean of: 13, 21, 42, 5, 6, 5, 47. Give your answer to 2 decimal places

    Answer: 19.86

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