Question

The number below has 2 as a factor. What could the unknown digit be?

Answer 1

Given that the number 5,83? has 2 as a factor then it mean that it is an even number and hence the last number which we will call x can be:
x=0,2,4,6,8
this means that the last number can be 0, 2,4,6 or 8. This means that any even number ends with one of the numbers at the end. 

Answer 2

Given that the number, 5,83_ has 2 as a factor.

It implies that the number 5,83_ is an even number

 

The number contains

5 thousands

8 hundreds

3 tens

? units

 

The possible units of an even number are 0, 2, 4, 6, and 8

Therefore, the unknown digit could be 0, 2, 4, 6, or 8