Posted by allison on Sunday, April 24, 2011 at 12:13am.
2, 4, 8,...
The first term of the sequence above is 2, and every term after he first term is 2 times the preceding term. How many of the first 50 terms of this sequence are less than 100?
(A) 22
(B) 25
(C) 28
(D) 30
(E) 37

MATH  Damon, Sunday, April 24, 2011 at 4:27am
2 4 8 16 32 64 128 256 ....
all negative terms are <100
plus the first three positive terms
so 25 + 3 = 28