Solution

40425

First name
Matthew James Gale
School
Oratia district primary school
Country
Age
10

The 100th point to be visited will be on the grid : 11x4.

The 40th point to be visited will be on the grid : 6x4.

The 60th point to be visited will be on the grid : 7x5.

If it goes 1x1, 2x2, 3x3, 4x4, 5x5, and on and on. Each one it goes up + 1 to the digit and add that to keep going on.

If it continues to 7x5 it will still be 60 still. And 6x4 will also be 40 still as well.