Here's a riddle...
Find the next number in the series.
1, 11, 21, 1211, 111221, 312211, 13112221
A few hints:
The numbers are in base-10. The number does not need a calculator/computer to calculate (not even basic functions such as + or -). It can be done completely mentally... not even pencil/paper is necessary.
Find the next number in the series.
1, 11, 21, 1211, 111221, 312211, 13112221
A few hints:
The numbers are in base-10. The number does not need a calculator/computer to calculate (not even basic functions such as + or -). It can be done completely mentally... not even pencil/paper is necessary.