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 Either way (Posted on 2022-01-05)
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 numbers Naveen Kumar 2022-01-25 02:19:00 re(2): Observation Ady TZIDON 2022-01-08 04:50:08 re(2): Observation Ady TZIDON 2022-01-08 04:49:23 re: Observation Steve Herman 2022-01-06 10:10:20 Observation Jer 2022-01-05 12:14:58 re: computer solution (spoiler) -- continued Charlie 2022-01-05 08:51:06 computer solution (spoiler) Charlie 2022-01-05 08:49:13 Part 2 (spoiler) Steve Herman 2022-01-05 07:58:24
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