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Odd Sequence (Posted on 2004-12-17)

Below are 2 different sequences, but the rules are the same,

2, 3, 3, 9, 9, ?

3, 7, 3, 3, 7, 9, ?

determine the two missing numbers and find the rule,

Bonus. how far can each sequence go? Can you find a longer sequence of numbers that follow the same rule?

Submitted by Juggler

Rating: 3.6667 (3 votes)

Solution: (Hide)

1st.
2
23
233
2339
23399
23399 3.
2nd.
3
37
373
3733
37337
373379
373379 9
From this the sequence should be self explanatory, each number when added to the end of the earlier digits creates a new prime number.
Well done to Charlie for getting the longest number here, or in fact for just getting all of the numbers.

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

Subject	Author	Date
Cleaner list	Charlie	2004-12-19 15:47:29
UBASIC program and complete list	Charlie	2004-12-18 15:06:59
No Subject	Christian	2004-12-17 19:17:50
All three parts	SteveH	2004-12-17 19:04:05
First half of second part	SteveH	2004-12-17 18:36:36
First part	SteveH	2004-12-17 18:31:00

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