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Quote:
Originally Posted by shabbir
Lets see if after 24 hours what the OP replies to
Kshiteej, Its more than 24 hours and so please update the question and tell us who is the winner.
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Contributor
Ans is 6121.
31-1 = 30 = (3)^3 +3
253-31 = 222 = (6)^3 + 6
991 -253 = 738 = (9)^3 + 9
2731 - 991 =1740 =(12)^3 + 12
so te ans will be 2731 + (15)^3 + 15 =6121
nimesh, xpi0t0s likes this
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So Congrats xpi0t0s
xpi0t0s like this
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Invasive contributor
very nice one kshiteej...
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Contributor
Thanks Mayjune and congrats xpi0t0s.

By the way what was your logic while calculating 6121? The same as of mine??
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Invasive contributor
nice question kshiteej
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Invasive contributor
Congrs xpi0t0s
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Mentor
Quote:
Originally Posted by Kshiteej
Thanks Mayjune and congrats xpi0t0s.

By the way what was your logic while calculating 6121? The same as of mine??
Heh, no, I did it in a spreadsheet and made a BIG assumption...column A contained the original sequence in A1-A5; B2=A2-A1 and copied the formula to B3-B5, C3-C5, D4-D5 and E5. I assumed that was the end of it and that the next row, if it existed, would end with E6=E5 and worked backwards to find out what would be in D6, C6, B6 and A6, and that's where I got 6121 from.

Then I looked up the sequence in the sequences database as explained (and linked) earlier in the thread.