<p>Hi guys,</p>

<p>I am solving some Real SAT exam and got those questions wrong.</p>

<p>I transformed Square root to power of 1/2,since I can't write square root notation here.</p>

<p>4)What is the radius of the largest sphere that will fit inside a cube with edges of length 2?</p>

<p>1) 1

2) 2^1/2

3) (3*2^1/2) / 2

4) 2

5) 2 * 2^1/2</p>

<p>13) For their graduation ceremony, the 100 students in Arlene's senior class were each assigned different whole number from 1 to 100. Arlene and her class entered the auditorium in numerical order, and every 20 students filled a different row, maintaining that order. There were aisles on both ends of each row, and only one student sat between Arlene and the aisle. which of the following CANNOT be Arlene number?</p>

<p>1) 19

2) 42

3) 59

4) 69

5) 82</p>

<p>Okay I don't really understood this question I understood it as there is auditorium and each student entered according to his number,so for example if person X has number = 1 then he would enter first and if person B has number = 2 he would enter second.

But how can I then formulate where Arlene number is if I didn't get enuff information and what is a "aisles".</p>