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 THREE Triangular Numbers (Posted on 2008-10-21)
Tom, Dick and Harry each chose a different 5-digit triangular number whose digits fell into the pattern THREE, where each different letter represents a different base-10 digit.

Dick's triangular number had no digit in common with either Tom's or Harry's.

What was Dick's number? What two triangular numbers did the other two choose?

 See The Solution Submitted by Charlie Rating: 2.0000 (1 votes)

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 Solution | Comment 3 of 4 |
There are nine 5-digit triangular numbers that fit the pattern THREE where each letter represents a different base-digit:

15400
17955
27966
40755
58311
75466
79800
84255
95266

Dick's triangular number is 27966.
Tom and Harry's triangular numbers are 15400 and 58311.

 Posted by Dej Mar on 2008-10-22 06:50:50

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