Lulu and Sophie from St. Nicolas C. of E. Junior School, Newbury have sent us a solution to the Multiples Grid problem. Thank you both! For the first large square, they say:

The blue numbers are all multiples of 7.

The pink numbers are all multiples of
5.

The maroon numbers are multiples of 5 and
7. (Both.)

In this square:

they say:

The pink numbers are multiples of
2.

The blue numbers are multiples of 5 or 7.

Are you sure the blue could be multiples of 5? In this square:

they say:

The blue numbers are multiples of
11.

The pink numbers are supposed to be
multiples of 8.

The maroons are multiples of 8 and
11.

In the next square:

they explain:

The blues are multiples of 9.

The pinks are multiples of 6.

The maroon numbers are multiples of 9 and
6.

Finally, in this last square:

Sophie and Lulu wrote:

The blues are multiples of 9.

The pinks are multiples of 4 or 8.

Thank you for sending us your solution, girls. Well done!