17 and 18
8
The numbers are 13 and 14.
15 and 16
62 and 63
12 and 13
The numbers are 12 and 14.
The numbers are 12 and 14.
12 and 13 (and you may note that 12+13 = 25)
The difference between the squares of two consecutive integers j and j+1 is |2j+1|. There are therefore two such pairs where this quantity is 17:-9 and -88 and 9
Consecutive numbers are whole numbers whose difference is 1.
24 and 25, which are (49-1)/2 and (49+1)/2
There are two consecutive even numbers. The numbers are 62 and 64.