Quest of Nine

The Book

Number patterns in Number Squares

X1234
11234
22468
336912
4481216
55101520

Look at this section from a multiplication square

Can you say how the rule for working out which numbers go in the white squares ?

1221
1624
25
303642
42

Here is a different part of the multiplication square. Can you fill in the missing numbers?

(look for horizontal and vertical patterns)

Try the Number Square Builder