### Times

Which times on a digital clock have a line of symmetry? Which look the same upside-down? You might like to try this investigation and find out!

### Clock Hands

This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.

### Ten Green Bottles

Do you know the rhyme about ten green bottles hanging on a wall? If the first bottle fell at ten past five and the others fell down at 5 minute intervals, what time would the last bottle fall down?

# A Calendar Question

### Why do this problem?

This problem could be used when calendars are being discussed, possibly at the beginning of January when a new year has just begun. Learners do need to be aware of the length of the months and of the effect of leap years on the days of the week and when they occur.

There are two copies of the calendar for July $2001$ on this sheet and six blank calendar months on this sheet .

### Key questions

Which years are leap years? Do you know how to tell?
Do you need to write out the dates for that month on a blank calendar?

### Possible extension

Learners could make tables of their results or make a year's worth of monthly calendars for three years hence. This sheet of six blank calendar months could be useful.

### Possible support

It might help for some children to work from a current yearly calendar to start with, noting which day the first of each month falls on, then the date of the first Sunday in each month.