Pinned 3 channelmtoBegginer Asked: May 17, 20212021-05-17T18:08:05+05:30 2021-05-17T18:08:05+05:30In: Programmers How many combinations are there to a 4-digit lock? 3 How many combinations are there to a 4-digit lock? mobilesoftwareunlock Share Facebook 3 Answers Voted Oldest Recent Random shafi Begginer 2021-05-18T05:39:10+05:30Added an answer on May 18, 2021 at 5:39 am 9999 3 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp channelmto Begginer 2021-05-20T12:51:02+05:30Replied to answer on May 20, 2021 at 12:51 pm nice good 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp channelmto Begginer 2021-05-17T18:08:50+05:30Added an answer on May 17, 2021 at 6:08 pm Answer: There are 9,999 different combinations in a 4-digit lock. Explanation: The 4-digit number on a lock begins from 0000 and ends up to 9999 which are: From 0000 to 0999 there are 999 combinations. (1,000) From 1,000 to 9,999 there are 8,999 combinations (9,000) And now we have 1,000+9,000=10,000combinations total. But… there are real 10,000 – 1 = 9,999 combinations, because the lock have already one combination on it at the time and if that combination is the right one the lock must be open, so we don’t have to search further for other combinations…!!! We have the one and we search for the other 9,999 combinations. 2 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerLeave an answerCancel reply Featured image Select file Browse Save my name, email, and website in this browser for the next time I comment.