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Cornerstone · Grades 3–5 Keystones #1 13 February 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 13 February 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄6

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 30

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 3:1

    Answer: 54 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 13, 25, 26, 30, 12, 16, 20, 25. Give your answer to 2 decimal places

    Answer: 20.88

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