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What's the next number is this sequence????

1, 11, 21, 1211, 111221, 312211, ??????

13112221


I like beer!

1113213211

13112221, 1113213211......... Describe the previous term.

Barhopr wrote:13112221


I like beer!

'Splain yo solution......

The sequence:
1
11
21
1211
111221
312211
13112221
1113213211
31131211131221
...

Solution: It's actually quite simple After starting the sequence with 1, each term in the sequence consists of groups of two numbers based on the previous term - the first being the quantity and the second specifying which digit.

Example: the first term is 1, which has "one 1" in it, therefore 11.
11 has "two 1's" in it, therefore 21.
21 has "one 2 and one 1" in it and therefore 1211.

dolphinatic wrote:

Barhopr wrote:13112221


I like beer!

'Splain yo solution......

Google search

And I can't explain it, I just like beer

That math stuff hurts my brain.

Barhopr wrote:

dolphinatic wrote:

Barhopr wrote:13112221

And I can't explain it, I just like beer

Tom Keels wrote:The sequence:
1
11
21
1211
111221
312211
13112221
1113213211
31131211131221
...

Solution: It's actually quite simple After starting the sequence with 1, each term in the sequence consists of groups of two numbers based on the previous term - the first being the quantity and the second specifying which digit.

Example: the first term is 1, which has "one 1" in it, therefore 11.
11 has "two 1's" in it, therefore 21.
21 has "one 2 and one 1" in it and therefore 1211.

You sir are correct

I had this one thrown at me last night by one of the profs here at school. I guess he was trying to see if I'm worth the pay Knocked it out in about 5 mins between trying to explain square roots to someone who shouldn't have made it out of high school