Guess the answer in less than a minute
1 1 1 2 1 1 2 1 1 1 1 1 2 2 1 3 1 2 2 1 1 1 3 1 1 2 2 2 1 1 1 1 3 2 1 3 2 1 1 ?
Above shows a sequence of integers that follow a certain pattern. What number can replace the question mark?
You can try My Other Problems .
The answer is 31131211131221.
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7 solutions
Sorry, this is a lateral thinking problem, not a Maths one. Personally, I don't think it should be on this site.
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now it is moved to logic section
You can refer to @Thomas Jones ' below! ;)
This is called the look-and-say sequence
I am familiar with this one. Thanks to my 8th grade math teacher :)
This is not Algebra :/
Wow...that was a real brain tickler..even though its not directly related to any series or any Mathematical logic..but really good puzzlle..
its agood one but not algebra
@Krishna good question bro
incredible !
wow that was awesome
Wow,wonderful problem!
I did not get this method can you tell me in detail
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Read the numbers aloud. The first number is 1. Then how many 1's in there? So, 1-1, the next number is 2-1, because there are 2-1s and so on. . .
woww,, it's amazing
Logical question
Good one..... BTW corrected on the 1st chance.
I have the same solution.
Try starting with 22...
very nice puzzle...
well thats not done
it is very awesome problem
hats off to you #Prestosa...
It is awesome, but not related to maths. Right?
I read the same question on a PUZZLE website.
Learnt a new type of sequence..!! Thnx!!
Anyone else get 4133113221?
i too agree with others this problem just wasted my 1 hr after which i got a stupid solution...please think before adding a problem that to which category it belongs to
please think before adding a problem into a particular category
U r great..
its not related to mathematics any way
I did the same
its not a maths problem in any way
Good question
This sequence is known as the Conway sequence (also the Look-and-say sequence; both are used), and can be described as simply saying the numbers.
The first number is 1 . The second number is "one 1", or 1 1 . The third number is "two 1s", or 2 1 , and so on.
Continued, the next term after those given in the question would be "three 1s; one 3; one 2; one 1; one 3; one 2; two 1s", or 3 1 1 3 1 2 1 1 1 3 1 2 2 1 .
Interesting. Are there other "sequences" like the Conway sequence?
Thanks for that information :)
Each number defines the previous number. It's defining how many times the digit is.
1 11 = one ONE 21 = two ONEs 1211 = one TWO and one ONE So, following this relation, we have the sequences is:
1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, 31131211131221
just count the succeeding numbers. like 111 = 31
I read it louder and got the answer :P
Its really easy if you read it aloud and use your logic and thinking skills
Read aloud the number. Say, its-11- read it as two-one. This will form the next number. So 21 is read out as - one-two, one-one....THus, we get 31131211131221