Someone's after you
The LCM of 11 and 21 is 231
You are 12-20. The only common factor of 11 and 21 is 1.
The GCF/HCF of 11 and 21 is 1.
Today - 1952 2008-11-21 was released on: USA: 21 November 2008
Pyramid - 2002 2002-11-21 was released on: USA: 21 November 2002
111221
1(one 1) 11(two ones) 21(one two and 1 1 ) and so on so 1 11 21 1211 111221 312211 13112221 1113213211
312211
1311221
Wrong. The fifth should be 111221.
312211 13112221
1113213211
111221
4211
13211221 111312212211 31131211131221 13211311123113112211 11121221133112132113212221 3112112221232112111312211312113211 1321122132111213122112311311222113111221131221 31131122112231131112132112311321322112111312211312111322212311322113212221
132231 Try saying the numbers out loud.
The next number in this sequence is 13112221.