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Cornerstone · Grades 3–5 Keystones #1 13 November 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 13 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 1⁄3

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 6 = 72

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:1:4

    Answer: 28, 28 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 10, 19, 39, 6, 19, 40. Give your answer to 2 decimal places

    Answer: 22.17

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