It is definitely composite. Any even number (except 2) can be divided by 2, a number ending in 5 (except 5) can be divided by 5, and any number ending in 0 can be divided by 2, 5, and 10.
A number divided by 2 its reminder is 1, A number divided by 3 its reminder is 2, A number divided by 4 its reminder is 3, A number divided by 5 its reminder is 4, A number divided by 6 its reminder is 5, A number divided by 7 its reminder is 6, A number divided by 8 its reminder is 7, A number divided by 9 its reminder is 8, A number divided by 10 its reminder is 9 what is that number?
2.4
2 1/2. 5 is an even number so you cant evenly divide it. 6 can be divided, and so can four, but 5 cant be divided evenly.
16 \;p
Because any number that ends with those numbers can be divided by a number. For example, 10 can be divided by 2 and 5, 4 can be divided by 2... However, 2 is a prime number; it's just numbers that END with 2 that aren't prime, like 12. 5 is exactly like 2, but a number that ends with 5 can be divided by 5.
0.4
35
no number does that
5.4
70
5