Yes, a square number means that it is the product of a number times the same number, so if you can divide a number buy the same number you get the square root. 6x6=36 and the square root of 36 is 6. 7x7 is 49 and the square root of 49 is 7. Make sense?
The next two square numbers after 30 are 36 and 49
36 and 49
36, 49
They are: 36 and 49
They are: 25, 36 and 49
25, 36, 49,...
76
36 and 49 do.
The perfect squares in the range are 25, 36 and 49.
36 and 49
25, 36, 49, 64
These numbers are: 25, 36, 49.