1.999 and 1.9999
Because the prime numbers between 1and 50 only have exactly 2 unique factors.
1+ 1and 1/2
The prime numbers: 2, 3, 5, 7, 11, 13, 17 and 19.
The numbers are 11 and 10
The even numbers between 1 and 13 are 2, 4, 6, 8, 10, and 12.
82
10
2
(1and 12) (2 and 6) (3 and 4)
10 2
[8] and [10].
3 & 5.