## Detailed description

The first nine rows of Pascal's triangle are shown with the fourth row numbers circled. These numbers are 1, 4, 6, 4, 1. The sum of the squares of these numbers is 70 which is the middle number in the eighth row.

The first nine rows of Pascal's triangle are shown with the fourth row numbers circled. These numbers are 1, 4, 6, 4, 1. The sum of the squares of these numbers is 70 which is the middle number in the eighth row.