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Cornerstone · Grades 3–5 Keystones #1 28 July 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 28 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 5⁄12

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

    Solve: 7x - 15 = 55

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 1:3

    Answer: 12 and 36
  5. 5. Statistics Mean

    Find the mean of: 21, 7, 17

    Answer: 15

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