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GRE - Quantitative Reasoning

A quant question (more)

QID : 61 - If x + (1/x) = 2, then what is the value of x64 + x121?

Options:
1) 0
2) 1
3) 2
4) – 2

Answer is Option 1) 0 

But How? 

x+(1/x)=2 x^2-2x+1=0 (x-1)(x-1)=0 x=1 X=1; therefore 1*64 + 1*121 =64+121=185 or I’m not sure what the question means. In the expression x64 + x121, are the numbers supposed to be exponents? If so, we could evaluate easily: 1^64 + 1^121 = 1+1 = 2.

A quant question (more)

QID : 61 - If x + (1/x) = 2, then what is the value of x64 + x121?

Options:
1) 0
2) 1
3) 2
4) – 2

Answer is Option 1) 0 

But How? 

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Eight points are equally spaced on a circle. If 4 of the 8 points are to be selected at random. What is the probability that a quadrilateral having the 4 points chosen as vertices will be a square? (more)

Eight points are equally spaced on a circle. If 4 of the 8 points are to be selected at random. What is the probability that a quadrilateral having the 4 points chosen as vertices will be a square?

webinar on Higher level geometry min max area (more)

I attended the webinar on Higher level geometry min max area.Are the problems solved the standard results for any problem or will it vary?

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webinar on Higher level geometry min max area (more)

I attended the webinar on Higher level geometry min max area.Are the problems solved the standard results for any problem or will it vary?

Be the first person to answer the question!