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Rationals Between...

What fractions can you find between the square roots of 65 and 67?

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Canny Fraction

Weekly Problem 4 - 2012
What fraction of the volume of this can is filled with lemonade?

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Circuit Training

Mike and Monisha meet at the race track, which is 400m round. Just to make a point, Mike runs anticlockwise whilst Monisha runs clockwise. Where will they meet on their way around and will they ever meet at the start again? If so, after how many circuits?

Counting Fish

Stage: 4 Challenge Level: Challenge Level:1

Suppose 20 fish are re-caught - that's 20 of the 40 caught first - what would be a good guess for the whole lake fish population in this case?