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Cornerstone · Grades 3–5 Keystones #1 15 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 15 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 1⁄12

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

    Solve: 3x - 18 = 12

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

    Calculate the hypotenuse when a = 9cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 3:2

    Answer: 54 and 36
  5. 5. Statistics Mean

    Find the mean of: 12, 17, 7

    Answer: 12

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