More PSAT help

G

Guest

Guest
Sequence I: 2,4,6,8,....
Sequence II: 1/64, 1/32, 1/16, 1/8....

In sequence I above, the first term is 2 and every term after the first is 2 greater than the previous term. In sequence II, the first term is 1/64 and every term after the first is 2 times the previous term. What is the least positive integer n for which the nth term of sequence II is greater than the nth term of sequence I?

So I did Sequence I: 2,4,6,8, 10,12,14,16,18,20,22,24
Sequence II: 1/64, 1/32, 1/16, 1/8, 1/2, 1,2,4,8,16,32

I stopped when Sequence II was greater than Sequence I, and my answer is 24

But the correct answer is 12

How do you get 12??
 
I think you missed a 1/4 in Sequence 2...(1/8)*2=(1/4)

But regardless, the question asks for the term number, not for the answer itself.

So, 24 is right, but since 24 is the 12th term in the sequence, the answer is 12.
 
You must log in or register to reply here.
Top