Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
IMHO A it is
1) is obvious
1st term is 1
and fourth =27
2)tricky The second to last term is 3^10.
insuff since we don't know how many terms there are in the sequence _________________