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...

Plum Tree

Label this plum tree graph to make it totally magic!

Magic W

Find all the ways of placing the numbers 1 to 9 on a W shape, with 3 numbers on each leg, so that each set of 3 numbers has the same total.

2-digit Square

Stage: 4 Challenge Level:

A $2$-digit number is squared. When the $2$-digit number is reversed and squared, the difference between the squares is also a square.

What is the $2$-digit number?