1 = x + 4
3 = x
2 = 2x + 5
3 = 2x
3/2= x
Answer:
5 different numbers, 2 even
Step-by-step explanation:
Since we have 5 digits and they are non repeating we can use the permutation formula:

It gives us the amount of ways to arrange k objects out of n objects without repetition, but order does matter.
In our case the amount of 4 digit numbers that can be formed using the digits from 1 to 5 is: 
And out of those 5, only 2 are even
The answer is 7 because 70 ÷ 10 = 7.
100+16=116 is the right answer
The only ways i thought of was 0.7, 0.70, and 0.700 .