4.6
20
2,3,5,6,9,10. Not by 4.
The number 4 is called a remainder
Any number divided by itself equals 1 as for example 5/5 = 1
5
How about: 25/5 = 5
0.8
4
Let's denote the number as x. The quotient of the number and 4 is x/4. Five less than this quotient would be (x/4) - 5. The equation we have is (x/4) - 5 = 15. By solving this equation, we find that x = 80.
-24
15