### Consecutive Numbers

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

### Calendar Capers

Choose any three by three square of dates on a calendar page...

### Days and Dates

Investigate how you can work out what day of the week your birthday will be on next year, and the year after...

# Ones, Twos and Threes

##### Age 11 to 14 ShortChallenge Level

Digits include $1, 2, 3, 1, 2, 3$ and maybe more
$1+2+3=6$ so any number with digits $1, 2, 3, 1, 2, 3$ is a multiple of $3$
$\Rightarrow$ use another $1$
$1112233$ smallest possible with another $1$ and this is also odd