Break the Lock (Number Puzzle)

[Otis]

In Sharon's four-digit bicycle lock combo, the last digit is one more than the first digit, the first digit is four less than the second digit, and the third digit is double the last digit. Which two digits are the same?

?

[imath]\;[/imath]

 

[blamocur]

Is this a known that there are two equal digits there? I.e., is none an acceptable answer?

 

[Otis]

Is [it] known that there are two equal digits

Yes.

(I don't like 'trick' questions.)



[imath]\;[/imath]

 

[lev888]

In Sharon's four-digit bicycle lock combo, the last digit is one more than the first digit, the first digit is four less than the second digit, and the third digit is double the last digit. Which two digits are the same?

?

[imath]\;[/imath]

2nd and 3rd

 

[Harry_the_cat]

Spoiler

2663, if there are two digits the same, the second and third digit are the same

 

[Otis]

Exactamente!

? ??

[imath]\;[/imath]