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OG17 OG18 OG19 OG20 OG2022 If the range of the six numbers 4, 3, 14, 7, 10, and x is 12, what is the difference between the greatest possible value of x and least possible value of x ?
190113 $$\frac{1}{n(n-1)}$$-$$\frac{1}{(n-1)(n-2)}$$=$$\frac{2}{n(n-1)(n-2)}$$,$$\frac{ab}{4*5*6}$$+$$\frac{ab}{5*6*7}$$+...+$$\frac{ab}{19*20*21}$$=?
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When is divided by , the remainder is . Is divisible by ?

(1) is an odd number

(2) is a multiple of

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If Chris saved $400 of his earnings last month, how much did Chris earn last month?

(1) Chris spent  of his earnings last month on rent and saved  of the remainder.

(2) Last month, Chris paid three times as much in loan payments as he saved. 
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Is between and on the number line?

(1) is to the right of on the number line.

(2) is to the left of on the number line.
Magoosh Set K consists of 4 integers. What is the median of K?(1) The average (arithmetic mean) of K is 3.(2) The mode of K is 3.
OG20 OG2022 If m and n are integers, what is the value of m + n ? 1.$$(x + m)(x + n) = x^{2} + 5x + mn\ and\ x ≠ 0.$$ 2.$$mn = 4$$
If a and b are positive numbers, is a < c?1.The ratio of a to b is 4:1, and the ratio of b to c is 2:7.2.ab > bc
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Of the students in a certain class, each student is either left-handed or right-handed and each student either has brown eyes or blue eyes. Of these students, are right-handed; and of those who are right-handed, have brown eyes. How many of the students are right-handed and have blue eyes?

(1) 8 students have blue eyes.

(2) 24 students are in the class.
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If the numbers , , , , and were ordered from greatest to least, the difference between the greatest and least numbers of the resulting sequence would be
If $$w=\frac{1+x\frac{y}{z^2}}{x+y}$$, $${x}=\frac{z}{2}$$, and $${y}={3}\frac{z}{4}$$,what is the value of w in terms of z?
191020 Is 2n+1 a multiple of 3?
(1)the remainder is 1 when n is divided by 3
(2)the remainder is 4 when n is divided by 6
OG18-数学分册 GMAT、gmat题库、gmat模考、gmat考满分In pentagon PQRST, PQ = 3, QR = 2, RS = 4 , and ST = 5. Which iof the lengths 5, 10, and 15 could be the value of PT?
If the sum of three integers is even, is the product of the three integers a multiple of 4 ?(1) All three integers are equal.(2) All three integers are even.
OG12 OG15 What is the average (arithmetic mean) of j and k ?(1)The average (arithmetic mean) of j + 2 and k + 4 is 11.(2)The average (arithmetic mean) of j, k, and 14 is 10.
PREP07 Test 2 If k is a positive integer and the tens digit of k + 5 is 4, what is the tens digit of k ?(1) k > 35 (2) The units digit of k is greater than 5.
300难题 What is the length of the hypotenuse of △ABC ? (1)The lengths of the three sides of △ABC are consecutive even integers. (2)The hypotenuse of △ABC is 4 units longer than the shorter leg.
OG12 OG15 OG16 OG17 OG18 A student's average (arithmetic mean) test score on 4 tests is 78. What must be the student's score on a 5th test for the student's average score on the 5 tests to be 80?
Set S consists of 5 values, not necessarily in ascending order: {4, 8, 12, 16, x}. For how many values of x does the mean of set S equal the median of set S?
If a is a positive integer, and if the units digit of $$\mathbf{a}^{2}$$ is 9 and the units digit of $$\mathbf({a}+{1})^{2}$$ is 4, what is the units digit of $$\mathbf({a}+{2})^{2}$$ ?