gmatgoal

According to set ans key OA EDBC However, IMHO that ans to the last question is B What do you guys think? Here's the question again- Q The author mentions the “aftermath of the Mount Saint Helens eruption” (lines 73-74) most likely in order to A. provide an example of the process that allows the repopulation of rivers whose indigenous salmon population has become extinct B. indicate the extent to which the disturbance of salmon habitat by human activity in one stream might affect the genetic structure of salmon populations elsewhere C. provide a standard of comparison against which the impact of human activity on the gene flow among salmon populations should be measured D. show how salmons’ homing instinct can be impaired as a result of severe environmental degradation of their natal streams E. show why straying rates in salmon populations remain generally low except when spawning streams suffer severe environmental disturbance

Any thoughts

Good solution from archive GMAT-HELP series

In order to have terminating decimal, the denominator should be something that can be converted to a form 10^x where x is an integer. This is only possible when denominator is of form 2^x * 5^y, where x and y are any integers. Then we can multiply both numerator and denominator by either 2^(y-x) or 5^ (x-y) and make it either 10^x or 10^y. Hence in the question values of a,c and e does not matter

Statement#1 x=4a+3 Dont know the value of y. If y is a multiple of 4, then xy/4 will have no remainder, otherwise there are multiple possibilities of remainder Not sufficient Statement#2 y=4c+2 Same scenario as statement#1 since we dont know the value of x Not sufficient Statement#1&2 y=4c+2 x=4a+3 xy=(4c+2)(4a+3) =16p+12q+8r+6=4k+2 Hence the remainder is 2 Ans=C

Kannn -One way to avoid such errors is to write the possible values of variable.

Use Fraction Rep for easier maths m/3+f/5=m/4 +f/4

Sequence Gà Y à R Question –What is the 24th tile? Statement#1 18th tile is not yellow and hence can be Green or Red 1 Y G 2 R Y 3 G R 24th tile can be G or R No sufficient Statement#2 19th tile is not green and hence can be Yellow or Red Possible combination 1 R G 2 G Y 3 Y R 24th tile can be Y or R No sufficient Statement #1 and #2 24th tile is R IMO=C

Concept -For fraction p/q to be a terminating decimal, the numerator must be an integer and the denominator must be an integer that can be expressed in the form of 2^x5^y where x and y are nonnegative integers. p/q =(2^a)*(3^b)/((2^c)*(3^d)*(5^e)) Hence we need to know whether b>d (1)Not sufficient (2)Yes IMO =B

Statement#1 | y + z| = | y| + | z| yz>0 y and z have the same sign Dont know the sign of x Not sufficient Statement#2 | x + y| = | x| + | y| xy>0 x and y have same sign z can be + or - -------------------------- x y z Is x (y + z) >= 0 -------------------------- + + - N + + + Y Not sufficient Statement 1 and 2 x, y and z have same sign -------------------------- x y z Is x (y + z) >= 0 -------------------------- - - - Y + + + Y Ans=C

El nino, the periodic abnormal warming of the sea surface off peru, a phenomenon in which changes in the ocean and atmosphere combine allowing the warm water that has accumulated in the western pacific to flow back to the east. The modifier highlighted in blue should be removed and what follows that should start with verb Hence a,b,c out Between D and E-in which is better because "where" refers to a place

IamnotFrench has a good point What is the grammar rule for selecting ? (a)as states open their utility markets to competition Vs (b)with states opening their utility markets to competition.

Sol Alc Water Total Sol 1 3x x 20 2 2y 3y 5 New sol 15+2/25=17/25

Good Explanation Anilmanu

Yup Ans shld be 3/38 Chorpulis's method is short and efficient