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The only contents of a container are 10 disks that are each numbered with a different positive integer from 1 through 10

The only contents of a container are 10 disks that are each numbered with a different positive integer from 1 through 10, inclusive. If 4 disks are to be selected one after the other, with each disk selected at random and without replacement, what is the probability that the range of the numbers on ...


If a two digit integer is divided by an integer formed by reversing its digits, what could be the maximum remainder? 1) 9 2)27 3)36 4)45 5) 54 How about 89 divided by 98? 89 divided by 98 equals 0 with remainder 89 I don't see 89 as an answer choice. Am I missing something? Cheers, Brent Sorry, jus...

by mensanumber

Tue Apr 17, 2018 1:31 pm
Forum: Problem Solving
Topic: Consider two integers: an original two digits integer and
Replies: 3
Views: 502

Consider two integers: an original two digits integer and

Consider two integers: an original two digits integer and the integer formed by reversing the digits of this original integer. If the bigger of these two integers is divided by the other integer, what could be the maximum remainder?
1) 9
2)27
3)36
4)45
5) 54

by mensanumber

Tue Apr 17, 2018 4:44 am
Forum: Problem Solving
Topic: Consider two integers: an original two digits integer and
Replies: 3
Views: 502

In how many ways can a person post 5 letters in 3 letter boxes? (A) 480 (B) 1024 (C) 54 (D) 3^5 (E) 5^3 Apparently, the solution is quite simple here: each letter will have 3 boxes to choose from and so answer 3^5. But I am having a tough time visualizing this solution. The way I am looking at is: ...

by mensanumber

Wed Mar 07, 2018 10:15 am
Forum: Problem Solving
Topic: In how many ways can a person post 5 letters in 3 letter box
Replies: 9
Views: 5584

In how many ways can a person post 5 letters in 3 letter box

In how many ways can a person post 5 letters in 3 letter boxes? (A) 480 (B) 1024 (C) 54 (D) 3^5 (E) 5^3 Apparently, the solution is quite simple here: each letter will have 3 boxes to choose from and so answer 3^5. But I am having a tough time visualizing this solution. The way I am looking at is: ...

by mensanumber

Wed Mar 07, 2018 9:58 am
Forum: Problem Solving
Topic: In how many ways can a person post 5 letters in 3 letter box
Replies: 9
Views: 5584

In how many ways can a person post 5 letters in 3 letter box

In how many ways can a person post 5 letters in 3 letter boxes? (A) 480 (B) 1024 (C) 54 (D) 3^5 (E) 5^3 Apparently, the solution is quite simple here: each letter will have 3 boxes to choose from and so answer 3^5. But I am having a tough time visualizing this solution. The way I am looking at is: ...

by mensanumber

Wed Mar 07, 2018 8:28 am
Forum: Problem Solving
Topic: In how many ways can a person post 5 letters in 3 letter box
Replies: 9
Views: 5584

In how many ways can a person post 5 letters in 3 letter box

In how many ways can a person post 5 letters in 3 letter boxes?

(A) 480
(B) 1024
(C) 54
(D) 3^5
(E) 5^3

by mensanumber

Wed Mar 07, 2018 8:18 am
Forum: Problem Solving
Topic: In how many ways can a person post 5 letters in 3 letter box
Replies: 9
Views: 5584

On a railway route between two places A and B, there are 10

On a railway route between two places A and B, there are 10 stations on the way. If 4 new stations are to be added, how many types of new tickets will be required if each ticket is issued for a one-way journey?

1) 108
2) 14
3) 48
4) 96

by mensanumber

Wed Mar 07, 2018 5:54 am
Forum: Problem Solving
Topic: On a railway route between two places A and B, there are 10
Replies: 3
Views: 2906

There are three parallel straight lines

There are three parallel straight lines. Two points A and B are marked on the first line, points C and D are marked on the second line and points E and F are marked on the third line. Each of these six points can move to any position on its respective straight line. What is the maximum number of tri...

by mensanumber

Tue Mar 06, 2018 11:55 pm
Forum: Problem Solving
Topic: There are three parallel straight lines
Replies: 1
Views: 477

Here is what is wrong with B: Assumption is something that has to be necessarily true BUT which is not already stated in the argument. So if assumption is not true the argument will fall apart. (Negation test) B- The medical expenses incurred by employees who are required to participate in the fitne...

by mensanumber

Fri Jul 15, 2016 10:16 am
Forum: Critical Reasoning
Topic: prep question
Replies: 10
Views: 7693

Thanks for your reply @GMATGuruNY. I followed the exact same steps except for in st1 instead of "Total profit = (2)(434) + (3.5)(400) = 868 + 1400 = more than 2000." I considered "(2)(418) + (3.5)(416)" and wasted a lot of time in calculations. But my bigger problem is understanding the implied ineq...

by mensanumber

Mon Dec 14, 2015 10:56 pm
Forum: Data Sufficiency
Topic: A company makes and sells two products, P and Q.
Replies: 3
Views: 4150

A company makes and sells two products, P and Q.

A company makes and sells two products, P and Q. The costs per unit of making and selling P and Q are $8.00 and $9.50, respectively, and the selling prices per unit of P and Q are $10.00 and $13.00, respectively. In one month the company sold a total of 834 units of these products. Was the total pro...

by mensanumber

Sat Dec 12, 2015 12:57 pm
Forum: Data Sufficiency
Topic: A company makes and sells two products, P and Q.
Replies: 3
Views: 4150

I think most of the gmat problems could have elegant solutions like the one given by Rich below. Though this one is not a very difficult question, i think it has implications. Test writers could make it into a difficult question by changing the answer choices as follows: 1) x=z^p & 2)y=(z-1)^q...whe...

by mensanumber

Sat Dec 05, 2015 10:34 am
Forum: Data Sufficiency
Topic: If x, y, and z are positive integers..............
Replies: 5
Views: 6681

Great- will use Bellcurve questions to practice my improvement area questions. Could never thank you enough for all your advice. At what stage do you think I should include bellcurve questions? If time is a concern what material from the above would see replaced by bellcurve questions? YOu seem to h...

by mensanumber

Sat Dec 05, 2015 5:30 am
Forum: GMAT Strategy
Topic: Strategies for preventing careless mistakes ...
Replies: 27
Views: 19513

Thanks so much for a detailed reply again. I wish I had used this forum more before writing my last GMAT. :) Here is a fairly comprehensive guide to handling three overlapping sets questions in various ways. http://www.beatthegmat.com/pizza-hoagies-and-tacos-t285217.html Exactly what I realized thro...

by mensanumber

Fri Dec 04, 2015 12:53 pm
Forum: GMAT Strategy
Topic: Strategies for preventing careless mistakes ...
Replies: 27
Views: 19513