<p>I have accumulated some questions that I did not understand from previous practice tests. Can you guys help me out?
1) What is the greatest number of pieces that can result from slicing a spherical orange with 3 straight cuts?
The answer is 8 but I said 7. </p>
<p>2) [Sometimes of] a history buff, my uncle has a collection [of] first edition biographies that [has been featured] in newspaper articles and magazine stories [alike].
The answer is No Error but I chose [something of] because its talking about the uncle so shouldn't it be "Someone like?" I know that it sounds awkward but a person can't be a thing. </p>
<p>3) [Concerned by] the patient's chest pains and breathing difficulty, the nursing student was quick [to realize] that these symptoms were [consistent to] [those] of a heart attack.
The answer is C but is A also wrong? Shouldn't it be concerned about (as stated in Silverturtle's guide)?</p>
<p>4) Martial arts students may choose from among many levels of classes, [there is one which is] best for their particular skills.
B) of which there is one
C) one of which is
I narrowed it down to these two but I choose B.. which is wrong. Why is it C?</p>