6- 10:6? = 36 ,7? = 49 ,8? = 64 ,9? = 8 1 , 10? = 100

1 1- 15: 1 1? = 12 1, 12? = 144 , 13? = 169 , 14? = 196 , 15? = 225

16-20: 16? = 256, 17? = 289 , 18? = 324, 19? = 36 1 ,20? = 400

2 1-25:2 1? = 44 1 ,22? = 484, 23? = 529 ,24? = 576, 25? = 625?

25-30:26? = 676, 27? = 729 ,28? = 784 ,29? = 84 1, 30? = 900

3 1-35:3 1? = 96 1, 32? = 1024 ,33? = 1089 ,34? = 1 156 ,35? = 1225

36-40:36? = 1296, 37? = 1369 ,38? = 1444 ,39? = 152 1, 40? = 1600

4 1-45:4 1? = 168 1, 42? = 1764 ,43? = 1849 ,44? = 1936 ,45? = 2025

46-50:46? =2 1 16, 47? = 2209 ,48? = 2304 ,49? = 240 1, 50? = 2500

Extended data

Related properties of square numbers:

1、a？ -B? =(a+b)(a-b).

2. The square number must not be a perfect number.

3. The square number is the sum of two adjacent triangles. The sum of two adjacent squares is a central square number. All odd squares are also central octagons.

4. If the square of odd number is divided by 4+ 1, the square of even number can be divisible by 4.

5. The square number is the sum of two adjacent triangles. The sum of two adjacent squares is a central square number. All odd squares are also central octagons.