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 In the triangle above, is $$x >90$$?(1) $${a}^{2}+{b}^{2}<{15}$$(2)$$c > 4$$
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181215 KMFPS
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If n is a positive integer, what could the unit digit of n(n+1)(n+2)(n+3)(n+4)?
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Manhattan
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What is the minimal value of function f(x)?(1) $$f(0) = 16$$(2) $$f(x) = (x – 4)^2$$
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OG18-数学分册
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If $$rs\neq 0$$, is $$ \frac{1}{r} + \frac{1}{s} = 4$$(1) r + s = 4rs(2) r = s
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 In parallelogram PQRS shown, if PQ = 4 and QR = 6, what is the area of PQRS?
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What is the value of u?1.$$\frac{7}{u}-{4}={10}$$2.$$\frac{32}{16}=\frac{1}{u}$$
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When the positive integer n is divided by 13, the remainder is 4. What is the remainder when 2n – 3 is divided by 13 ?
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Magoosh
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Working together, Machine A and Machine B can produce a total of 200 widgets in 4 hours. How many hours would it take Machine A, working alone, to produce 200 widgets?(1) Working alone, Machine B takes 5 hours to produce 50 widgets.(2) Machine A can produce 4 widgets in the same amount of time it takes Machine B to produce 1 widget.
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OG12 OG15 OG16 OG17 OG18
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y=kx+3In the equation above, k is a constant. If y = 17 when x = 2, what is the value of y when x = 4 ?
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PREP07 Test 1
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If p is a positive integer, what is the value of p ?(1) p/4 is a prime number.(2) p is divisible by 3.
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OG18 OG19 OG20 OG2022
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If x and y are positive integers, is xy even? (1) $$x^{2} + y^{2} - 1$$ is divisible by 4. (2) x+y is odd.
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OG20 OG2022
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If a and b are integers, and b > 0, does $$\frac{a-1}{b+1}=\frac{a}{b}$$
1.$$a = b – 4$$
2.$$a = –b$$
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181215
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Does the parabola y=$$x^{2}$$+c intersect with the line y=mx+b?
1：c-b<0
2：$$m^{2}$$-4(c-b) ≥ 0
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190124
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N is divisible by 5. what is N?
1：When N is divided by 4, the remainder is 3.
2：N is divisible by 3.
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190302
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The sum of x, y, and z is even. Can xyz be divided by 4?
1: x=y=z
2: x,y,z are even.
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Magoosh
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If $$72^{4}$$ is the greatest common divisor of positive integers A and B, and $$72^{6} $$is the least common multiple of A and B, then AB=
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181215
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The lengths of the three sides of isosceles triangle are t-6, t-4, and 2t-20. Which of the following may be the perimeter of the triangle?
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190603
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The number of a bacteria triples every 30 minutes, how many times the number of the bacteria after 4 hours is the number of bacteria after 2 hours?
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Magoosh
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What is the value of x?Statement #1:$$(x – 5)^2$$=0Statement #2: $$(x – 3)^2$$ = 4
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OG19 OG20 OG2022
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Which of the following is one difference between Type 2 situations and Type 4 situations, as they are described in the passage?
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