perplexus.info :: Sequences : Starting with 1,2,3

Starting with 1,2,3 (Posted on 2018-03-17)

1, 2, 3, 6, 9, 54, 9, 36, 9.....

What are the next three numbers?
Evaluate the 1000th number.

No Solution Yet Submitted by Ady TZIDON

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how think this sequence could go

Comment 1 of 1

Two last digits sum

Sum*last digit

Two last digits sum

Sum*last digit

1+2=3

3*2=6

6+3=9

9*6=54

5+4=9

9*4=36

6+3=9

9*6=54

5+4=9

9*4=36

So it goes 1,2,3,6,9,54,9,36,9,54,9,36,9

The 1000th term is 0 mod 4 so itis = term 8 =36

Posted by armando on 2018-03-17 12:00:21

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