There are for pairs of co-primes between 1 and 25. They are (3, 5), (5, 7), (11, 13), and(17, 19).
It can have anywhere between 0 and 12 pairs of parallel sides.
The only arithmetic mean of 7 and 25 is (7+25)/2 =16. If you really mean all arithmetic means of all possible pairs of numbers between 7 and 25, then there are so many pairs you should clearly state so in your question. Or better still, just write them down, work them out and add them up, which is what I would have to do.
25 pairs, including the pair (2, 3).
the pairs are 1 x 25 5 x 5
There are 25 of them.
It can have anywhere between 0 and 12 pairs of parallel sides.
Two.
25
25
The only arithmetic mean of 7 and 25 is (7+25)/2 =16. If you really mean all arithmetic means of all possible pairs of numbers between 7 and 25, then there are so many pairs you should clearly state so in your question. Or better still, just write them down, work them out and add them up, which is what I would have to do.
25 chromosomal pairs
Up to 12 pairs.
12 pairs of ribs and 25 in the sternem
The factor pairs of 25 are 1 x 25 and 5 x 5
25 pairs, including the pair (2, 3).
1 and 25 5 and 5
The factor pairs of 25 are: 1 × 25 5 x 5