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A Numeral Sequence Problem (Posted on 2006-11-07)

Change the position of only one number in the sequence given below in order that the amended sequence corresponds to a palindromic sequence.

1, 4, 9, 6, 2, 1, 5, 10, 4

*** Source: Adapted from a problem which appeared in Mensa Canada Website.

Submitted by K Sengupta

Rating: 4.5000 (4 votes)

Solution: (Hide)

We shift the number 2 to the last position, giving the sequence:
1, 4, 9, 6, 1, 5, 10, 4, 2

When each term of the amended sequence is converted to Roman Numerals; without commas it reads as:

IIVIXVIIVXIVII.

The above sequence is clearly palindromic as sought for in the problem.

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A different solution is given by tomarken in this location

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Solution	Dej Mar	2008-10-10 10:12:34
Yet another way	Tristan Nieto	2008-10-09 13:07:51
Another way	Larry	2006-11-09 07:20:35
Solution	tomarken	2006-11-07 23:21:23
re: Solution?	Larry	2006-11-07 19:52:02
Solution?	Guest	2006-11-07 19:47:31

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