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OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 Material A costs $3 per kilogram, and material B costs $5 per kilogram. If 10 kilograms of material K consists of x kilograms of material A and y kilograms of material B, is x > y?(1)y > 4(2)The cost of the 10 kilograms of material K is less than $40.
Magoosh If the line passes through the origin, what is the value of k?GMAT、gmat题库、gmat模考、gmat考满分
Ready4

The sequence s1, s2, s3, ...sn, ...,sn,...is such that sn = \frac{1}{n} - \frac{1}{n + 1} for all integers n \geq 1. If k is a positive integer, is the sum of the first k terms of the sequence greater than \frac{9}{10}?

(1) <font color='#FE8080'>k</font> > 10

(2) <font color='#FE8080'>k</font> < 19
Magoosh What is the value of n?(1) j = -4(2) j = -kGMAT、gmat题库、gmat模考、gmat考满分
Magoosh If f(x) = $$12-{x^{2}\over{2}}$$and f(2k) = 2k, what is one possible value for k?
A total of j dollars is given to Abby, Bill, and Carla and divided equally among them. Then Abby gives Bill k dollars, Bill gives Carla 2k dollars, and Carla gives Abby 3k dollars. Afterwards, Abby has exactly half of all the dollars given to the three people. In terms of k, how much money was given originally to Abby, Bill, and Carla?
Magoosh If $$f(x) = x^{2} + 4$$ and f(2k) = 36, then which of the following is one possible value of k?
Does the product jkmn equal 1?(1)$$\frac{jk} {mn}=1$$(2)$$j=\frac1 k$$ and $$m=\frac1 n$$
OG20 OG2022 In any sequence of n nonzero numbers, a pair of consecutive terms with opposite signs represents a sign change. For example, the sequence –2, 3, –4, 5 has three sign changes. Does the sequence of nonzero numbers $$s_1$$, $$s_2$$, $$s_3$$, - , $$s_n$$ have an even number of sign changes? 1.$$s_k= (-1)^{k}$$ for all positive integers k from 1 to n. 2.n is odd.
Magoosh 2k years ago Frank was 3k years old. In k years Frank's age, in years, will be
OG12 OG15 OG16 OG17 The length of the edging that surrounds circular garden K is $$\frac12$$ the length of the edging that surrounds circular garden G. What is the area of garden K ? (Assume that the edging has negligible width.)(1)The area of G is 25π square meters.(2)The edging around G is l0π meters long.
190302 The distance one student walked in t seconds is 2/k. How far can the student walk y min at the same speed?
模考带练机经题 If $$k_1$$=200,and $$k_n$$=200+0.2 $$k_{n-1}$$(k ≥ 2) ,the value of $$k_{40}$$ is between?
Ready4

Three carpenters , , and working simultaneously and independently at their respective constant rates, can build a shed in 8 hours. How long does it take Carpenter , working alone at a constant rate, to build the shed?

(1) Carpenters and , working simultaneously and independently at their respective constant rates, can build the shed in 12 hours.

(2) Carpenters and , working simultaneously and independently at their respective constant rates, can build the shed in 16 hours.
If n = 3k, is k an integer?(1) n is an integer.(2) n/6 is an integer.
PREP07 Test 2 Is the positive integer n odd?(1) n = 2k + 1, where k is a positive integer.(2) 2n + 1 is an odd integer.
PREP07 Test 1 Is the integer k divisible by 4 ? (1) 8k is divisible by 16. (2) 9k is divisible by 12.
PREP07 Test 2 Working alone at its own constant rate, a machine seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours. If the two machines, each working at its own constant rate and for the same period of time, together sealed a certain number of cartons, what percent of the cartons were sealed by the machine working at the faster rate?
A geometric sequence is one in which the ratio of any term after the first to the preceding term is a constant. If the letters a, b, c, d represent a geometric sequence in normal alphabetical order, which of the following must also represent a geometric sequence for all values of k?I. dk,ck,bk,akII.a+k,b+2k,c+3k,d+4kIII.$$ak^{4},bk^{3},ck^{2},dk$$
OG19 OG20 OG2022 In the xy-coordinate plane, if the point(0, 2)lies on the graph of the line 2x+ky =4, what is the value of the constant k?