March 2011 – SAT Math Questions and Answers
2011 SAT Math Answers for the Guid-in:

9. 1/2 or 0.5 (3x=42; what is 7/x?)
10. 270 (total degree measure of a linear pair and a right angle)
11. 8 (pairs were 1 and 12, 2 and 11, 3 and 10, 4 and 9, 5 and 8, and 6 and 7; we wanted the number that pairs with 5)
12. 3 (average area of a piece of a 500-piece jigsaw puzzle that covered a 30×50 area)
13. 2010 (|x – k| < 2 and 2008 < x < 2012; what is k?)
14. 56 (purchasing 24 things at \$35 with a 10% discount versus purchasing 25 things at a 20% discount)
15. 862 (largest 3-digit number whose digits multiply to 96)
16. 1.10 (reading the graph; the 1.5(?)- and 2-minute calls both cost \$.30, and the 3.7-minute call cost \$.50)
17. 0 < x < 0.1 (x/x^2 is greater than 10; what could x be?)
18. 24 (minimum perimeter of an arrangement of 4×4, 3×3, 2×2, and 1×1 squares)

2011 SAT Math Multiple Choice questions and answers:

– None (p* = (100p)* question)
– xa^2 (x^n = a, what is x^(2n+1)
– 10pi (the spiral’s length)
– 115 (not present in set containing multiples of 7 and 5)
– 2 (most probable sum if large number of people spin spinner twice)
– 70% (21 in to 6 in of topsoil)
– y = (-1/2)x – 6 (possible equation of parallel line)
– 6 (possible arrangements including Sarah and Alicyn
– 1 (number of times f(x) = 0 when graph moved down 3 units)
– II and III (roman numeral question with parallel and perpendicular lines)
– \$5000 (difference between year 5 and 6 or growing on 5 acres)
– 55 (value of angle z, you’re given x = 70, y is also in the figure)
– X < Z < Y (Choice A, the triangle with sides 3, 4, 5 and the x, y, z angles on the outside of the triangle)
– Median 12, Average 19 (add 100 onto the last term in a set of 25 numbers, original median = 12, average = 15 (?) )
– 100pi (circle, radius drawn, chord drawn perpendicular to radius, chord = 16, radius up to chord = 6, find circle’s area)
– 1 + root(3) (bisected triangle)
– -4 (system of equations)
– 3:1 ratio
– c/12 (dvided computers among schools then departments)
-Which one must be positive: -1/y
-5/6 (2 times a number, n, subtracted from 5 is the same as 4 times the number…what is n?)

Other interesting questions and answers:

• It stated that P* = (100P)*, saying how many primes would work for that equation.  Answer: NONE
• If x^n = a, what does x^(2n+1) equal?  Answer:xa^2
• (shows 4 squares, with sides 4,3,2 and 1) – The squares above are rearranged on the same plane so they share sides or parts of sides, but no interior points. What is the smallest perimeter that this arrangement can yield?  Answer: 24