To filter one number out of four

Budget 233$ per month

Posted: 4 year ago

Opened

Description: we have 7 numbers. three numbers are given so we have four numbers left. one of four numbers is not belong to these 7 numbers and needs to be filter out. it could be in any order.
for example
954, 1236 answer is 162 so number 3 is filtered out
954, 0237 answer is 703
712 , 0349 answer is 340
927, 3456 answer is 354
538, 0469 answer is 640
538, 0679 answer is 906
need to know what is happening??,
and find a universal logic for it
of what you have a pattern.
what condition should satisfy this results
no need of software programming
I will provide more , if your logic is correct I buy your service at 90%
Skills:
software development

Source: peopleperhour.com