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another confusing sc

Just because King Alfred occupied and fortified London in 886 did not mean that he also won the loyalty of its citizens: the invading Danes were well aware of this weakness and used it to their advantage in 893. (A) Just because King Alfred occupied and fortified London in 886 did not mean that he ...

tough sc

A majority of the international journalists surveyed view nuclear power stations as unsafe at present but that they will, or could, be made sufficiently safe in the future. (A) that they will, or could, (B) that they would, or could, (C) they will be or could (D) think that they will be or could (E)...

diebeatsthegmat wrote:

replayyyy wrote:If x<0, then second square of -x*|x| is

-x
-1
0
x
second square of x

is second square meant squareroot?

because x is negative |x|=-x and -(-x)=x so the second suare of x*-x=-x
the answer is A

If for any positive integer x , d[x] denotes its smallest odd divisor and D[x] denotes its largest odd divisor, is x even? 1. D[x] - d[x] = 0 2. D[3x] = 3 Smallest odd divisor of any positive integer is 1. Thus, d[x] = 1 for any integer x > 0 Statement 1: D[x] - d[x] = 0 => D[x] = d[x] = 1 => x = 1...

tough DS - Special operations

If for any positive integer x , d[x] denotes its smallest odd divisor and D[x] denotes its largest odd divisor, is x even?

1. D[x] - d[x] = 0
2. D[3x] = 3

OG Quant #113

In the fraction x/y, where x and y are positive integers, what is the value of y?
(1) the least common denominator of x/y and 1/3 is 6
(2) x=1

IMO 78 From the question stem we know the following: Mean = Median = 55 No of numbers = 5 Sum of numbers = 275 1) L = 3S + 20 2) 2S + 110 + L = 275 Equation 1) is from the question stem "largest number in the set is equal to 20 more than three times the smallest number". Equation 2) maxim...