Percents
There are 400 boys and 300 girls in a certain school. If 25 percent of the boys are seniors and 20 percent of the girls are seniors, then how many seniors are there in the school?
A 100
B 150
C 160
D 200
C 160
An acidic solution is mixed so that the mass ratio of nitric acid to water is 2:7. If a total of 270 grams of acid solution is mixed, how many more grams of water are there than nitric acid?
A) 60
B) 110
C) 150
D) 210
C 150
If Joey's birthday is in July, what is the probability that his birthday is on the fourth of July?
1/31 or .03226
What are the order of operations and the acronym for them.
PEMDAS
parenthesis
Exponents
Multiplication/Division
Addition/Subtraction
x6/x2=
x4
Of 1,000 people asked their opinion of a new television show, 60 liked the show but the rest did not. What percent of the people did not like the show?
A 6%
B 9.4%
C 50%
D 94%
D 94%
If 20 centimeters of rope can be used to tie together 3 bundles of sticks, how many bundles of sticks can be tied together by 40 meters of rope?
A 6
B 600
C 1,500
D 6,000
B 600
A bag contains 7 blue marbles and 14 marbles that are not blue. If one marble is drawn at random from the bag, what is the probability that the marble is blue?
A) 1/3
B) 1/2
C) 2/3
D) 3/7
If you are almost out of time, how should you complete your unanswered questions?
1. Try to quickly eliminate wrong answer choices.
2. Make an educated guess.
3. If all else fails, bubble one letter for every unanswered question.
2x-5y=12 and 2y-x=7 According to the system of equations above, what is the value of x-3y?
A -26
B 5
C 53/8
D 19
D
If 50 is 20 percent of x, then x =
A 250
B 100
C 40
D 25
A 250
In a certain forest, 1/7 of the oak trees represent 1/14 of all the trees. What is the ratio of oak tree to non-oak trees in that forest?
A 1:1
B 1:2
C 1:7
D 1:13
A 1:1
A coin is flipped 5 times. What is the probability of flipping tails every time.
A 1/32
B 1/4
C 4/1
D 1/2
A 1/32
How many math sections are on the SAT? Whats the difference between them?
2
Calculator and No Calculator
(x6)2=
x12
In a certain store, the price of a stereo was increased by $42, or 6 percent of the original price. What was the stereo's original price?
A $252
B $600
C $658
D $700
D $700
The force required to stretch a spring beyond its natural length is proportional to how far the spring is stretched. If a force of 8 pounds stretches a spring 16 centimeters beyond its natural length, what force, in pounds is needed to stretch this spring 42 centimeters beyond its natural length?
A 15
B 21
C 31
D 42
B 21
A bag of mini donuts has 5 chocolate donuts, 6 powdered donuts, 1 cream cheese donut, and 3 plain donuts. If you reach into the bag, what is the probability that you will get a donut that is not chocolate or powdered?
A 11/15
B 1/3
C 6/15
D 4/15
D 4/15
True or False?
The best way to manage your time is to give each question equal time.
False.
70-80% of your time should be spent on questions that are easy and medium difficulty for you.
Find the minimum value for the quadratic equation.
f(x)=x2+4x+6
minimum value is 2
A store which formerly sold peppers at 4 pounds for $2.00 changed the price to 2 pound for $1.50. If x is the percent increase in the price per pound, x =
A 25%
B 12.5%
C 16.67%
D 20%
B 12.5%
If 20 centimeters of rope can be used to tie together 3 bundles of sticks, how many bundles of sticks can be tied together by 40 meters of rope? (1 meter = 100 centimeters)
A 6
B 150
C 600
D 1,500
C 600
A jar contains only red marbles and white marbles. If the probability of selecting a red marble is r/y, which of the following expressions gives the probability of selecting a white marble in terms of r and y?
A) (r-y)/y
B) (y-r)/y
C) r/y
D) y/r
B. (y-r)/y
On average, how much time do you get per question on each math section?
Section 3: 1.47 minutes (1 min. 28 sec.)
Section 4: 1.45 minutes (1 min. 27 sec.)
If w+(10x/2y)=0 and 3y+8x=-7x, find the value of w.
1