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[email protected] Revolution wrote:[GMAT math practice question]

If n is positive integer, is 4^n+n^2+1 divisible by 2?

1) n is a multiple of 4
2) n is a multiple of 6
4^n is always even.
n^2 is even if n is even, odd if n is odd.
4^n+n^2+1 is even if n is odd, odd if n is even.
1) and 2) are both individually sufficient: D

by kyuhunl

Tue Jan 29, 2019 11:46 pm
Forum: Data Sufficiency
Topic: If n is positive integer, is 4^n+n^2+1 divisible by 2?
Replies: 3
Views: 336

DS arithmetic

If a>b>0, is b<2?

1) 1/a > 1/2

2) 1/a + 1/b = 1

OA:D

by kyuhunl

Tue Jan 29, 2019 11:44 pm
Forum: Data Sufficiency
Topic: DS arithmetic
Replies: 2
Views: 314

DS algebra

$$\frac{2^{x+y}}{2^{x-y}}=?$$

1) x=1

2) y=2

OA:C

by kyuhunl

Tue Jan 29, 2019 11:41 pm
Forum: Data Sufficiency
Topic: DS algebra
Replies: 1
Views: 285

PS arithmetic

$$\left(1+\sqrt{3}\right)\sqrt{2+\sqrt{3}}=?$$

A. $$\sqrt{2}\left(2-\sqrt{3}\right)$$
B. $$\sqrt{2}\left(2+\sqrt{2}\right)$$
C. $$\sqrt{2}\left(2+\sqrt{3}\right)$$
D. $$\sqrt{2}\left(3+\sqrt{3}\right)$$
E. $$\sqrt{3}\left(2+\sqrt{3}\right)$$

OA: C

by kyuhunl

Tue Jan 29, 2019 11:14 pm
Forum: Problem Solving
Topic: PS arithmetic
Replies: 3
Views: 363

DS work rate problem

When working together at their constant rates, machines A and B can complete a certain task in 4 hours. How many hours would it take machine B to complete the task, when working alone at its constant rate? 1) When working alone at its constant rate, machine A can finish the task in 6 hours. 2) When ...

by kyuhunl

Tue Jan 29, 2019 11:11 pm
Forum: Data Sufficiency
Topic: DS work rate problem
Replies: 2
Views: 343

Is the median of the 3 different integers equal to their

Is the median of the 3 different integers equal to their average (arithmetic mean)?

1) The median of the 3 integers is 19

2) The range of the 3 integers is 19

can anybody explain this for me?

by kyuhunl

Tue Jan 29, 2019 11:08 pm
Forum: Data Sufficiency
Topic: Is the median of the 3 different integers equal to their
Replies: 2
Views: 308

Dwight and Mose decide to build a new barn on their farm, and they begin to work in alternating shifts, with Dwight taking the first shift. During each of his shifts, Dwight does 1/4 of the remaining work. During each of his shifts, Mose does 1/6 of the remaining work. How much of the barn is left ...

by kyuhunl

Tue Jan 29, 2019 10:57 pm
Forum: Problem Solving
Topic: Dwight and Mose decide to build a new barn on their farm, an
Replies: 3
Views: 315

Mock Tests

Yeah, I guess those mock tests are good for trying some challenging questions, but doesn't really reflect your would-be score in the real exam.
But look at the bright side - your score is definitely going to be higher than what you got on the mock test!


I don't really think you can do much in 10 days.. but personally, I think the best way is to take as many practice tests as possible. Make yourself familiar to the test structure and check where you get most of your wrong answers, etc.

by kyuhunl

Tue Jan 29, 2019 5:36 am
Forum: The GMAT Avengers Study Group
Topic: Help on how to clear most GMAT in 10 days? :(
Replies: 4
Views: 1782

Isn't it TTF? The number of unlimited lanes sure looks like it has a negative correlation with the average customer age. The three stores with the oldest customers don't have any and the more unlimited lanes you have, the younger the average customer.

by kyuhunl

Tue Jan 29, 2019 4:30 am
Forum: GMAT Integrated Reasoning
Topic: Need help with this IR question from GMAT prep software
Replies: 4
Views: 5255

Is tutoring necessary for Verbal?

I'm planning to have my first GMAT this summer, and I'm gathering info. I tried some practice exams, and I think I got quant covered, getting 50-51, but I'm having trouble with Verbal since English is not my native language. I'm an undergrad student and can't really spend too much time on the GMAT d...

by kyuhunl

Tue Jan 29, 2019 3:46 am
Forum: GMAT Strategy
Topic: Is tutoring necessary for Verbal?
Replies: 7
Views: 1280

Anyone tried the Ready4GMAT CATs?

I tried the Ready4GMAT Android app and they say I can get 7 CAT simulations for a $12 monthly subscription, thought it's a nice deal.. did anybody try this one?

+ I checked the web and they charge a different price for it.. hmm..

by kyuhunl

Tue Jan 29, 2019 3:32 am
Forum: GMAT Strategy
Topic: Anyone tried the Ready4GMAT CATs?
Replies: 0
Views: 461