IBM Ponder This Puzzle: October Edition: Complete the sequence

Kaustubh Katdare · 2009-10-03T22:25:25+00:00

Complete the following sequence : 1, 13, 2, 1, 5, 3, 2, 1, 4, 4, 7, 3, 1, 5, 3, 5, ?, ? Any takers?

IBM Ponder This Puzzle: October Edition: Complete the sequence

Kaustubh Katdare

Administrator

Updated: Oct 26, 2024

Views: 1.0K

Complete the following sequence :

1, 13, 2, 1, 5, 3, 2, 1, 4, 4, 7, 3, 1, 5, 3, 5, ?, ?

Any takers?

0

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Kaustubh Katdare

Administrator • Oct 4, 2009

The_Big_K
Complete the following sequence :

1, 13, 2, 1, 5, 3, 2, 1, 4, 4, 7, 3, 1, 5, 3, 5, ?, ?

Any takers?
Too big for your little brains, folks ?

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electron1212

Member • Oct 4, 2009

last number in the seq is 2 ...am i rite ?

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skipper

Member • Oct 4, 2009

Look at subgroups starting with 1:

1,13,2
1,5,3,2
1,4,4,7,3
1,5,3,5,?,?

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Kaustubh Katdare

Administrator • Oct 4, 2009

electron1212
last number in the seq is 2 ...am i rite ?
How about detailed explanation?

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Anil Jain

Member • Oct 5, 2009

A real tough one for my small mind 😁 I am scratching my head since long but all in vain. This IBM "Ponder this" is a bit tougher then the usual ones.

Biggi could you please provide any clue for this???

-CB

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Sahithi Pallavi

Member • Oct 6, 2009

will you provide any clue for us Biggie.

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Sahithi Pallavi

Member • Oct 8, 2009

Biggie, can you give any clue for us..

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Kaustubh Katdare

Administrator • Oct 12, 2009

*bump*

Don't give up so easily, folks.

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skipper

Member • Oct 13, 2009

1,13,2
1,5,3,2
1,4,4,7,3
1,5,3,5,?,?

Write it in binary:
1,1101,10
1,101,11,10
1,100,100,111,11
1,101,11,101,??

Rewrite as sums of powers of 2:
0,3+2+0,1
0,2+0,1+0,1
0,2,2,2+1+0,1+0
0,2+0,1+0,2+0,?,?

...etc

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sookie

Member • Oct 13, 2009

"A MATHEMATICIAN IS A BLIND MAN IN A DARK ROOM LOOKING FOR A BLACK CAT WHICH ISN'T THERE" -Charles Darwin

Counting the no. of letters in each word of the quote.

1, 13, 2, 1, 5, 3, 2, 1, 4, 4, 7, 3, 1, 5, 3, 5, 4 , 5

Is this the answer ? I counted ISN'T as 4 - not sure. 😕

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Sahithi Pallavi

Member • Oct 13, 2009

sookie
"A MATHEMATICIAN IS A BLIND MAN IN A DARK ROOM LOOKING FOR A BLACK CAT WHICH ISN'T THERE" -Charles Darwin

Counting the no. of letters in each word of the quote.

1, 13, 2, 1, 5, 3, 2, 1, 4, 4, 7, 3, 1, 5, 3, 5, 4 , 5

Is this the answer ? I counted ISN'T as 4 - not sure. 😕

what a logic sookie..😁 😁

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Saandeep Sreerambatla

Member • Oct 13, 2009

Sookie Excellent man!!!

@Skipper: After writing as powers of two whats the next step to arrive at the answer??

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itchap

Member • Oct 13, 2009

Excellent logic Sookie!!!😉😉

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Kaustubh Katdare

Administrator • Oct 13, 2009

Hah! Sookie got it.

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justaglance

Member • Oct 15, 2009

Really Great sookie

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Manish Goyal

Member • Oct 15, 2009

excellent sookie
but can you share with us how you get the answer of this puzzle?

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skipper

Member • Oct 16, 2009

uh huh. How do you have any idea that you can try English words, and the numbers are the numbers of letters? Why not French or Greek, say? Why would you assume it's in a written language?

Good guess though. I suppose if the information was included (that the code is for words in a language), that would help. I was trying to compress the code to see if a pattern existed which was self-referential. That means not finding any pattern would mean having to assume an arbitrary code, which is more or less what English is.

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durga ch

Member • Oct 17, 2009

I totally agree with skipper. Biggie, was a code given as clue? how ever we would associate what sookie said to the sequence what you mentioned?

Sookie,
any feed-ups here? quite curious to know what prompted you to consider the quote what you had stated.

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Kaustubh Katdare

Administrator • Oct 17, 2009

I was planning to add a hit in case no one cracked it. 😀 I admit this one wasn't a regular puzzle.

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sookie

Member • Oct 20, 2009

skipper
uh huh. How do you have any idea that you can try English words, and the numbers are the numbers of letters? Why not French or Greek, say? Why would you assume it's in a written language?
Sure Good point , you can try German or French or English but do you know any such quote that satisfy the numbers in the given sequence ? If yes, Please let me also know. Also, if you people have any other way to get the answer as 4 and 5. You can surely tell. May be your answer is better logic of solving this sequence Every individual has different thinking logic. :sshhh:

Yep, I know now my answer is 100% right. I confirmed with IBM folks itself. 😀

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skipper

Member • Oct 20, 2009

Can I ask what led you to guess it was length of English words, just a hunch?
Actually when you think about it, it would be an obvious thing to eliminate as a possibility; I leapt straight into the idea of a code without thinking how it was encoded already.

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