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#### Resources tagged with PM - Mathematical Modelling similar to Weekly Problem 42 - 2009:

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##### Other tags that relate to Weekly Problem 42 - 2009
Clock. Angles. Mirrors. Calculating with fractions. Visualising. Angles at a point/on a line. Mathematical modelling. Time.

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Broad Topics > Secondary processes > PM - Mathematical Modelling

### Hands Together

##### Stage: 3 Challenge Level:

Sometime during every hour the minute hand lies directly above the hour hand. At what time between 4 and 5 o'clock does this happen?

### Christmas Trees

##### Stage: 3 Challenge Level:

Christmas trees are planted in a rectangular array of 10 rows and 12 columns. The farmer chooses the shortest tree in each of the columns... the tallest tree from each of the rows ... Which is. . . .

### Friday 13th

##### Stage: 3 Challenge Level:

This month there is a Friday the thirteenth and this year there are three. Can you explain why every year must contain at least one Friday the thirteenth?