972285
10 + √68 (≈ 18.246) and 10 - √68 (≈ 1.754) (10 + √68) + (10 - √68) = 20 (10 + √68) x (10 - √68) = 32
60, 62, 64, 66, 68
43, 23 and 2
The two numbers are 43 and 68. 43 + 68 = 111, while 68 - 43 = 25
68
972285
The correct order is 85021. Subtracting 85021 from 21058 equals 64877.
Yes. 68 - 20 = 48
68, 0.68, 0.6
28
68
68
221
No, it is composite.
1 + 2 + 4 + 17 + 34 + 68 = 126
The total sum is 96