Question

please solve if you can. ​

Answer 1

1 × 1 = 1 < 31

2 × 2 = 4 < 31

3 × 3 = 9 < 31

4 × 4 = 16 < 31

5 × 5 = 25 < 31

6 × 6 = 36 > 31 (not true for condition)

S = {1, 2, 3, 4, 5}