- #1

- 367

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What comes next?

5, 3, 42, 86, 15, 24, 25, 168, 2, 4, ?

5, 3, 42, 86, 15, 24, 25, 168, 2, 4, ?

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- Thread starter Moo Of Doom
- Start date

- #1

- 367

- 1

What comes next?

5, 3, 42, 86, 15, 24, 25, 168, 2, 4, ?

5, 3, 42, 86, 15, 24, 25, 168, 2, 4, ?

- #2

- 239

- 0

6 could it be

- #3

- 367

- 1

Nope, not 6.

Larger.

Larger.

- #4

- 509

- 0

Answer: 35

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- #5

- 367

- 1

Good job, Bicycle Tree! You're good.

- #6

James R

Science Advisor

Homework Helper

Gold Member

- 600

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Is anybody going to explain?

- #7

- 509

- 0

Ok. The sequence is a palindrome.

- #8

- 918

- 16

In that case, 3 would serve as well (until moo added the extra condition).

- #9

- 239

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what palindrome suppose to mean ?

- #10

- 222

- 0

ArielGenesis said:what palindrome suppose to mean ?

Palindrome is the same backwards as it is forwards... they just have the commas in strange places.

- #11

NateTG

Science Advisor

Homework Helper

- 2,450

- 6

42861524251682435

142861524251682435

1142861524251682435

11142861524251682435

111142861524251682435

1111142861524251682435

And so on.

- #12

- 54

- 0

If you take the 4 (from the 24) as the middle of the sequence, then the numbers before and after are the same. So directly before/after the 4 there is a 2 then a 5 then a 1 then a 6 and then an 8 and so on. I would have thought that the answer could have also been:

'3, 5' (but then there would be more commas on the right of the 4)

PS

'3, 5' (but then there would be more commas on the right of the 4)

PS

Last edited:

- #13

- 239

- 0

so the trick is just right at the comma. i got it. thx all

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