Place six coins on the table in the arrangement shown in the first row below...
Start like this...head tales head tales head tales
Your task is to produce the second arrangement shown by flipping coins according to thsi rule: you must flip two adjacent coins at a time.
End up like this....heads heads heads tale tale tale....
HTHTHT
flip 2,3
HHTTHT
Flip 4,5
HHTHTT
flip 3,4
HHHTTT