190321
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x=(x+y+z+w)/4 -1, y = (x+y+z+w)/3 - 3 , z=(x+y+z+w)/4 , w=16.x=?
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191020
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Is x^2 a factor of y^2?
(1)x^3 is a factor of y^3
(2)x^4 is a factor of y^4
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191031
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Is the number of the roots of x^2-4x+c=0 greater than 1?
(1)C≥-4
(2)C≤4
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191222
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If x and y are positive numbers, is x^5 < y^3?
(1)$$x^4 < y^3
(2)x^5 < y^4$$
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190302 还原机经选题: 数论&代数
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d_1=\sqrt{6^{2}+8^{2}} ,d_2=$$\sqrt{8^{2}+(6+4\frac{3}{4})^{2}}.Which range does d_2 - d_1$$ fall in?
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OG19 OG20 OG2022
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$$(\frac{1}{2}-\frac{1}{3})+(\frac{1}{3}-\frac{1}{4})+(\frac{1}{4}-\frac{1}{5})+(\frac{1}{5}-\frac{1}{6})$$
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If {v}{m}{t}\neq{0}, is $${v}^{2}{m}^{3}{t}^{4} >{0}?(1){m} >{v}^{2}(2){m} >{t}^{4}$$
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What is the value of $${a}^{4}-{b}^{4}?(1){a}^{2}-{b}^{2}= 16(2)a+b=8$$
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If x and y are integers, what is the value of $${2}{x}^{6y}-{4} ?(1) {x}^{2y}={16}$$(2) xy = 4
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Magoosh
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From a total of 5 boys and 4 girls, how many 4-person committees can be selected if the committee must have exactly 2 boys and 2 girls?
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Manhattan
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If abcd \neq 0, is $$ab^2c^3d^4 < 0?(1) ab^2c^3 < 0(2) b^2c^3d^4 < 0$$
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Is ab> 35?1. -4 < a < 3 and -5< b<4.2. a < 5 and b <7.
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If 6a + b = 48, what is the value of b?1. $${4}{a}^{2}={50}2. {4}{a}={b}+{2}$$
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PREP07 Test 2
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What is the value of $$a^4 - b^4 ?(1) a^2 - b^2 = 16$$(2) a + b = 8
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OG18-定量推理
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If a =$$ 1 +\frac{1}{4} +\frac{1}{16} + \frac{1}{64} and b = 1+ \frac{1}{4}a$$, then what is the value of a-b?
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OG19-定量推理
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If $$a= 1 + \frac{1}{4} + \frac{1}{16} + \frac{1}{64} and b = 1 + \frac{1}{4}a, then what is
the value of a - b$$ ?
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Ready4
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(5^<font color='#FE8080'>4</font>)(3^5)}{90^2}=)
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Ready4
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(5^3)(3^<font color='#FE8080'>4</font>)}{360^2}=)
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Ready4
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(5^3)(2^<font color='#FE8080'>4</font>)}{120^2}=)
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Ready4
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What is the greatest prime factor of ?
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