Sorting Numbers

Samantha from Kaleen Primary School wrote:

1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49
My group is all odd numbers from 1 to 50

Molly from Worfield Primary sent in some different sets:

Odd Numbers between 0 and 25 (half of 50):
1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 and 25.

And Even Numbers between 25 and 50:
26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48 and 50.

I wonder if "between" is the right word to use here? What do you think?

Alex from Sprowston Juniors and Yale from Randwick Public School offered similar sets. Here is Alex's:

Prime Numbers up to twenty: 2, 3, 5, 7, 11, 13, 17, 19

And Yale's:

Again, perhaps "between" isn't quite right?

Finally, Roxy from Burrowmore Primary found a different way of sorting the numbers. She says:

What a good idea, Roxy!