Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
The squares,
1
2
1^2
1
2
,
9
2
9^2
9
2
,
11
2
11^2
1
1
2
,
19
2
19^2
1
9
2
,
21
2
21^2
2
1
2
, and
29
2
29^2
2
9
2
, all have 1 in their units place. Write the next two squares.
Browse the problem library