find sequence?
Level
pending
1,11,21,1211,111221,? find missing number
The answer is 312211.
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1 solution
1= "1" time 1=11
11="2" times 1=21
21="1" time 2 and "1" time 1=1211
1211="1" time 1 and "1" time 2 and "2" times 1=111221
111221="3" times 1 and "2" times 2 and "1" time 1=312211
312211 is the answer