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Either way (Posted on 2022-01-05) Difficulty: 3 of 5
Consider a pair of 3-digit numbers 122 & 213.
Their product is 25986.
Invert both numbers and consider the new product- it is 68952 i.e. inversion of the previous result!

List all such pairs of 3 digit numbers, avoiding trivial solutions.

Are there such pairs of 4 digit numbers?

Either find some or prove there are none.

No Solution Yet Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
awesome trick for numbersNaveen Kumar2022-01-25 02:19:00
re(2): ObservationAdy TZIDON2022-01-08 04:50:08
re(2): ObservationAdy TZIDON2022-01-08 04:49:23
Some Thoughtsre: ObservationSteve Herman2022-01-06 10:10:20
ObservationJer2022-01-05 12:14:58
re: computer solution (spoiler) -- continuedCharlie2022-01-05 08:51:06
Solutioncomputer solution (spoiler)Charlie2022-01-05 08:49:13
Some ThoughtsPart 2 (spoiler)Steve Herman2022-01-05 07:58:24
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