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4^n is always even.Max@Math 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
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: 676
- by kyuhunl
Tue Jan 29, 2019 11:44 pm- Forum: Data Sufficiency
- Topic: DS arithmetic
- Replies: 2
- Views: 639
- by kyuhunl
Tue Jan 29, 2019 11:41 pm- Forum: Data Sufficiency
- Topic: DS algebra
- Replies: 1
- Views: 627
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: 721
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: 650
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: 619
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: 628
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!
- by kyuhunl
Tue Jan 29, 2019 5:38 am- Forum: The GMAT Avengers Study Group
- Topic: Veritas Mock - Really challenging, but very unrealistic ?
- Replies: 3
- Views: 3596
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: 3148
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: 2
- Views: 14002
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: 1932
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: 816