Number  Squares of the numbers  Number Between the squares  Numbers of the members 
1 and 2 
1
^{
2
}
= 1
2 ^{ 2 } = 4 
2, 3  2 
2 and 3 
2
^{
2
}
= 4
3 ^{ 2 } = 9 
5, 6, 7, 8  4 
3 and 4 
3
^{
2
}
= 9
4 ^{ 2 } = 16 
10, 11, 12, 13, 14, 15  6 
10 and 11 
10 ^{ 2 } = 100 11 ^{ 2 } = 121 
101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120

20 
∴ We observe that
Number between squares = 2 × Smaller number