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What is the standard deviation of a1, a2, a3, …, a100?
by Max@Math Revolution »
What is the standard deviation of a 1 , a 2 , a 3 , …, a 100 ? 1)...
1
Last post by Max@Math Revolution
Mon Mar 16, 2020 2:51 am
If the 1st term of a sequence is 0 and the 2nd term is 1, is the 5th term 2 ?
by BTGmoderatorDC »
If the 1st term of a sequence is 0 and the 2nd term is 1, is the 5th...
1
Last post by Jay@ManhattanReview
Mon Mar 16, 2020 12:44 am
A positive integer n has the smallest 3 prime numbers as its only prime factors. How many positive integers divide n
by BTGmoderatorDC »
A positive integer n has the smallest 3 prime numbers as its only...
1
Last post by deloitte247
Sun Mar 15, 2020 1:40 pm
In the coordinate plane above, what is the area of rectangular region MNRS ?
by BTGModeratorVI »
In the coordinate plane above, what is the area of rectangular...
1
Last post by Brent@GMATPrepNow
Sun Mar 15, 2020 12:31 pm
If y = x^2 - 6x + 9, what is the value of x?
by Brent@GMATPrepNow »
If y = x^2 - 6x + 9, what is the value of x? (1) y = 0 (2) x + y = 3...
2
Last post by Brent@GMATPrepNow
Sun Mar 15, 2020 12:29 pm
The figure above represents a box that has the shape of a cube.
by BTGModeratorVI »
The figure above represents a box that has the shape of a cube. What...
2
Last post by Brent@GMATPrepNow
Sun Mar 15, 2020 4:50 am
If x + y + z > 0, is z > 1?
by BTGModeratorVI »
If x + y + z > 0, is z > 1? (1) z > x + y +1 (2) x + y + 1...
2
Last post by Brent@GMATPrepNow
Sun Mar 15, 2020 4:49 am
In the xy-plane, line k passes through the point (1, 1) and line m passes
by BTGModeratorVI »
In the xy-plane, line k passes through the point (1, 1) and line m...
3
Last post by Brent@GMATPrepNow
Sun Mar 15, 2020 4:47 am
In the figure above, what is the value of z?
by BTGModeratorVI »
In the figure above, what is the value of z? 1) x = y = 1 2) w = 2...
2
Last post by deloitte247
Sat Mar 14, 2020 6:09 pm
Exponents/Powers, Number Properties
by swerve »
The numbers \(D, N,\) and \(P\) are positive integers, such that \(D...
1
Last post by deloitte247
Sat Mar 14, 2020 7:50 am
What is (a-b)^2?
by Max@Math Revolution »
What is (a-b)^2? 1) |a| = 4, |b| = 3 2) b/a < 0
2
Last post by deloitte247
Sat Mar 14, 2020 6:27 am
Probability
by swerve »
A class contains boys and girls. What is the probability of selecting...
1
Last post by Brent@GMATPrepNow
Fri Mar 13, 2020 8:57 am
If x, y, and d are integers and d is odd, are both x and y divisible by d ?
by BTGmoderatorDC »
If x, y, and d are integers and d is odd, are both x and y divisible...
2
Last post by Brent@GMATPrepNow
Fri Mar 13, 2020 6:56 am
What is the value of a^3 + a^2b + ab^2 + b^3?
by Max@Math Revolution »
What is the value of a^3 + a^2b + ab^2 + b^3? 1) a + b = 2...
1
Last post by Max@Math Revolution
Fri Mar 13, 2020 1:41 am
Sean and George collect two kinds of kernels: apricot kernels and mango kernels. If George has 4 apricot kernels...
by BTGmoderatorLU »
Source: Economist GMAT Sean and George collect two kinds of kernels:...
1
Last post by Jay@ManhattanReview
Thu Mar 12, 2020 9:04 pm
If xy < zy < 0, is y positive?
by BTGModeratorVI »
If xy < zy < 0, is y positive? (1) x < z (2) x is negative...
1
Last post by Brent@GMATPrepNow
Thu Mar 12, 2020 5:54 am
If [x] denotes the least integer greater than or equal to x, is [x] = 0?
by BTGModeratorVI »
If denotes the least integer greater than or equal to x, is = 0? (1)...
1
Last post by Brent@GMATPrepNow
Thu Mar 12, 2020 5:52 am
Is mn < 10?
by BTGModeratorVI »
Is mn < 10? (1) m < 5 and n < 2 (2) 1 < m < 3 and n^2...
2
Last post by Brent@GMATPrepNow
Thu Mar 12, 2020 5:51 am
What was the total amount of postage required to mail n letters?
by AAPL »
GMAT Paper Tests What was the total amount of postage required to...
1
Last post by Brent@GMATPrepNow
Thu Mar 12, 2020 5:49 am
Last school year, each of the 200 students at a certain high school attended the school for the entire year. If there we
by BTGmoderatorDC »
Last school year, each of the 200 students at a certain high school...
1
Last post by Jay@ManhattanReview
Thu Mar 12, 2020 1:18 am
What is the average of
by Max@Math Revolution »
What is the average of \(x_1,x_2,...,x_{10}\) ? 1) The average of...
1
Last post by Max@Math Revolution
Thu Mar 12, 2020 12:12 am
A company has 2 departments, department A has 5 employees, and department B has 6 employees. All employees of the compan
by Max@Math Revolution »
A company has 2 departments, department A has 5 employees, and...
1
Last post by Max@Math Revolution
Thu Mar 12, 2020 12:07 am
In a certain class, the ratio of girls to boys is 5:4. How many girls are there?
by BTGModeratorVI »
In a certain class, the ratio of girls to boys is 5:4. How many girls...
2
Last post by Brent@GMATPrepNow
Wed Mar 11, 2020 3:25 pm
If the 1st term of a sequence is 0 and the 2nd term is 1, is the 5th term 2 ?
by BTGModeratorVI »
If the 1st term of a sequence is 0 and the 2nd term is 1, is the 5th...
2
Last post by swerve
Wed Mar 11, 2020 9:17 am
Is the integer x a 3-digit integer?
by BTGModeratorVI »
Is the integer x a 3-digit integer? (1) x is the square of an...
1
Last post by Brent@GMATPrepNow
Wed Mar 11, 2020 6:14 am
In a certain class, the ratio of girls to boys is 5:4...
by AAPL »
Magoosh In a certain class, the ratio of girls to boys is 5:4. How...
1
Last post by Brent@GMATPrepNow
Wed Mar 11, 2020 6:12 am
Machines X and Y work at their respective constant rates. How many more hours does it take machine Y...
by BTGmoderatorLU »
Source: GMAT Prep Machines X and Y work at their respective constant...
1
Last post by Jay@ManhattanReview
Tue Mar 10, 2020 11:11 pm
A square piece of paper is cut by n different straight lines, each passing through two parallel sides of the square. If
by BTGmoderatorDC »
A square piece of paper is cut by n different straight lines, each...
0
Last post by BTGmoderatorDC
Tue Mar 10, 2020 6:26 pm
If there are more than two numbers in a certain list, is each of the numbers in the list equal to 0?
by BTGmoderatorDC »
If there are more than two numbers in a certain list, is each of the...
1
Last post by Brent@GMATPrepNow
Tue Mar 10, 2020 5:22 am
Geometry
by swerve »
Is the perimeter of triangle \(ABC\) greater than \(12\) cm? 1) One...
0
Last post by swerve
Mon Mar 09, 2020 3:32 pm
Does positive integer a equal 5?
by BTGModeratorVI »
Does positive integer a equal 5? (1) a is a not factor of 6006. (2) 5...
1
Last post by Brent@GMATPrepNow
Mon Mar 09, 2020 6:21 am
Is integer k a prime number?
by BTGModeratorVI »
Is integer k a prime number? (1) k = 10! + m, where 1 < m < 8...
1
Last post by Brent@GMATPrepNow
Mon Mar 09, 2020 6:20 am
When x is a real number
by Max@Math Revolution »
When x is a real number, {x} denotes the integer part of...
1
Last post by Max@Math Revolution
Sun Mar 08, 2020 6:18 pm
If x = 0.abcd, where a, b, c, and d each represent a nonzero digit of x, what is the value of x ?
by BTGmoderatorDC »
If x = 0.abcd, where a, b, c, and d each represent a nonzero digit of...
0
Last post by BTGmoderatorDC
Sun Mar 08, 2020 5:50 pm
Kevin buys beer in bottles and cans. He pays $1.00 for each can of beer and $1.50 for each bottle...
by BTGmoderatorLU »
Source: Princeton Review Kevin buys beer in bottles and cans. He...
2
Last post by deloitte247
Sun Mar 08, 2020 1:10 pm
If a, b, and c are integers, what is the value of a?
by BTGModeratorVI »
If a, b, and c are integers, what is the value of a? (1) (a - 7)(b -...
1
Last post by swerve
Sun Mar 08, 2020 7:37 am
Two circles overlap such that the center of each circle lies on the circumference of the other. What is the
by BTGmoderatorDC »
Two circles overlap such that the center of each circle lies on the...
1
Last post by swerve
Sun Mar 08, 2020 7:23 am
What is the value of jk - mj?
by BTGModeratorVI »
What is the value of jk - mj? (1) k - m = 7 (2) j = 11 Answer: C...
2
Last post by Brent@GMATPrepNow
Sun Mar 08, 2020 6:25 am
Is the perimeter of a certain triangle less than 24 inches?
by AAPL »
Princeton Review Is the perimeter of a certain triangle less than 24...
1
Last post by Brent@GMATPrepNow
Sun Mar 08, 2020 6:22 am
If n is an integer between 100 and 900, what is the tens digit of n?
by BTGmoderatorDC »
If n is an integer between 100 and 900, what is the tens digit of n?...
1
Last post by deloitte247
Sat Mar 07, 2020 11:20 pm
Two teams, X and Y, played against each other in a tournament for the championship.
by BTGModeratorVI »
Two teams, X and Y, played against each other in a tournament for the...
1
Last post by Brent@GMATPrepNow
Sat Mar 07, 2020 5:38 am
If x^2 - y^2 = 27, what is the value of (x + y)^2 ?
by BTGModeratorVI »
If x^2 - y^2 = 27, what is the value of (x + y)^2 ? (1) y = 3 (2) x -...
1
Last post by Brent@GMATPrepNow
Sat Mar 07, 2020 5:37 am
If Shannon's age is exactly half of Josh's age, what is Shannon's age?
by BTGModeratorVI »
If Shannon's age is exactly half of Josh's age, what is Shannon's...
1
Last post by Brent@GMATPrepNow
Sat Mar 07, 2020 5:36 am
A paint mixture was formed by mixing exactly 3 colors of paint.
by BTGModeratorVI »
A paint mixture was formed by mixing exactly 3 colors of paint. By...
2
Last post by Brent@GMATPrepNow
Fri Mar 06, 2020 6:30 am
If x, y, and z are prime numbers and x<y<z, what is the value of x?
by AAPL »
Manhattan Prep If x, y, and z are prime numbers and x < y < z,...
1
Last post by Brent@GMATPrepNow
Fri Mar 06, 2020 6:22 am
Events A and B are independent and have equal probabilities of occurring. What is the probability that event A occurs?
by BTGmoderatorDC »
Events A and B are independent and have equal probabilities of...
1
Last post by Jay@ManhattanReview
Fri Mar 06, 2020 5:55 am
The temperature of a place at noon on a certain day is 25% higher than the temperature...
by BTGmoderatorLU »
Source: e-GMAT The temperature of a place at noon on a certain day...
1
Last post by Jay@ManhattanReview
Fri Mar 06, 2020 4:11 am
During an experiment, some water was removed from each of the 6 water tanks. If the standard deviation of the volumes of
by BTGmoderatorDC »
During an experiment, some water was removed from each of the 6 water...
1
Last post by Jay@ManhattanReview
Fri Mar 06, 2020 2:59 am
A and B are subsets of positive integers. Are the standard deviations of A and B equal?
by Max@Math Revolution »
A and B are subsets of positive integers. Are the standard...
1
Last post by Max@Math Revolution
Fri Mar 06, 2020 1:57 am
What number is 6 more than x + y ?
by BTGModeratorVI »
What number is 6 more than x + y ? (1) y is 3 less than x. (2) y is...
2
Last post by Brent@GMATPrepNow
Thu Mar 05, 2020 5:47 am