Find the four digit numbers #abcd# that satisfy, #2(abcd)+1000=dcba#?
2 Answers
See below.
Explanation:
Number
and
and this cannot be accomplished with
Explanation:
write:
this implies that:
We also know that:
also notice from the last expression
This limits a to be
So now let's try if
Pick
If we pick
The last digit of
We have 2 scenarios:
Scenario :
Scenario:
Therefore the answer is: