4 and 25 are.
They are: 25 minus 4 = 21
25 and 4 or 121 and 100
They are: 25-4 = 21
112 - 102 = 21
16
The two square numbers with a difference of 21 are 25 and 4. This is because (5^2 = 25) and (2^2 = 4), and their difference is (25 - 4 = 21).
44
-19
Well, butter my biscuit! The two square numbers that add up to 85 are 64 and 21. 64 is 8 squared, and 21 is 4 squared. So, there you have it, darlin' - 8 squared plus 4 squared equals 85.
21 multiplies to 21 to make it 441
I think the question may refer to which two squares differ by 21. Two solutions : 112 - 102 = 121 - 100 = 21. 52 - 22 = 25 - 4 = 21.
The spacing between any two consecutive square numbers (n) and (n+1) is equal to (2n +1), so for 2n+1 =21, n =10 and the numbers are 121 and 100.However, there is a non-consecutive pair as well: 25 and 4.The squares lower than 100 are 1, 4, 9, 16, 25, 36, 49, 64, and 81, and an examination of these shows that there are no other pairs that satisfy the conditions.