how many robots

Question

Dr Gosh built a robot that can make other robots. It can make one robot per month and each new robot learns to make robots after 1 month. If the first robot begins making robots on January 1, how many robots will there be at the end of the year?

Answer 1

You would have 2 robots the beginning of February, one of which hasn't learned how to make robots yet. 3 robots beginning of March, 2 of which can now make robots. 5 robots in April, 8 in May, etc.