## Friday, January 18, 2013

### Tuneup for Jan 2013 SAT MATH -- TEST YOURSELF

The following questions reflect the medium to more difficult questions on a typical SAT math section. Both multiple choice and "grid-ins" are included.

ALLOW THREE MINUTES.

1.  The base of a parallelogram is 3 times the base of a triangle; the height of the parallelogram is twice the height of the triangle. What is the ratio of the area of the parallelogram to the area of the triangle?
(A) 24 (B) 12 (C) 9 (D) 6 (E) 3

2.  If (8x+8)^2 = 64 and x≠0, then x^2 = ?

3.  What is a value of x for which 1/(10x-20) > 10?

4.  The first 2 terms of a sequence are 4 and 6 and each term after that is the average of all the preceding terms. What is the sum of the first 22 terms?

Answers (formatting error corrected, hopefully! Thanks, Sue)
1.  B.
2.  4
3.  2.01>x>2
4.  110

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Sue VanHattum said...

Hmm, I went over 3 minutes on the first 3 problems.

There's a formatting problem with the answers. Do you mean for #3 to say just 2? That would make the fraction undefined. The proper answer is 2<x<2.01. (I checked it here: http://www.wolframalpha.com/input/?i=1%2F%2810x-20%29%3E10)

Dave Marain said...

Thanks, Sue.
This is what happens when I start blogging again after a long hiatus. I forget HTML rudiments! Of course, it figures that this is the only comment I receive! Nothing changes...

Sue VanHattum said...

Are you wishing more people would comment about the questions?

I goofed on the 4th question, and only saw the symmetry in it after I used excel to test my answer. Sigh...

Dave Marain said...

I can see how many people are reading these posts. I must be doing something wrong if I invite response and receive silence!I have always blogged primarily for teachers to share instructional strategies...