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ps question

Problem Solving
ps question

If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words? A. 5 to 4 B. 3 to 2 C. 2 to 1 D. 5 to 1 E. 6 to 1 Hi, I dont understand the meanin...

by dunkin77

Thu Jun 28, 2007 3:42 am
Forum: Problem Solving
Topic: ps question
Replies: 2
Views: 1754

730 ... not too glad

I just Beat The GMAT!

Congraturations! :D Thanks so much for your help - your explanation has always beeb so helpful.... Hope you dont "disappear" from this forum!!!

by dunkin77

Mon Jun 25, 2007 10:16 pm
Forum: I just Beat The GMAT!
Topic: 730 ... not too glad
Replies: 17
Views: 9553

ps 31

Problem Solving

Oops, thank you.

but still if I substitute..

2x+2(200-x) = 560

x get zero...

by dunkin77

Tue Jun 19, 2007 6:28 pm
Forum: Problem Solving
Topic: ps 31
Replies: 3
Views: 2118

ds 33

Problem Solving
ds 33

Seven different numbers are selected from the integers 1 to 100, and each number is divided by 7. What is the sum of the remainders?

(1) The range of the seven remainders is 6.
(2) The seven numbers selected are consecutive integers.



I thought was C but answer is different. Can anyone help?

by dunkin77

Tue Jun 19, 2007 5:22 pm
Forum: Problem Solving
Topic: ds 33
Replies: 2
Views: 2009

ps 31

Problem Solving
ps 31

A small, rectangular park has a perimeter of 560 feet and a diagonal measurement of 200 feet. What is its area, in square feet? A. 19,200 B. 19,600 C. 20,000 D. 20,400 E. 20,800 2x+2y = 560 x^2 + y^2 =200 x+y=10sqrt2 so, 2x+2(10sqrt2 -x)=560 then x becomes 0... Can anyone explain where did I do wron...

by dunkin77

Tue Jun 19, 2007 5:20 pm
Forum: Problem Solving
Topic: ps 31
Replies: 3
Views: 2118

DS 26

Data Sufficiency
DS 26

If positive integer x is a multiple of 6 and positive integer y is a multiple of 14, is xy a multiple of 105?

(1) x is a multiple of 9.
(2) y is a multiple of 25.

Can anyone help?

by dunkin77

Tue Jun 19, 2007 3:08 pm
Forum: Data Sufficiency
Topic: DS 26
Replies: 1
Views: 1976

ps 13

Problem Solving
ps 13

Can anyone help? OA is A.

by dunkin77

Tue Jun 19, 2007 3:03 pm
Forum: Problem Solving
Topic: ps 13
Replies: 1
Views: 1906

ps question

Problem Solving
ps question

I think width: length is 1:2 but I could not figure from the point...

by dunkin77

Tue Jun 19, 2007 6:21 am
Forum: Problem Solving
Topic: ps question
Replies: 2
Views: 1822

ps question

Problem Solving
ps question

Can anyone help ?

by dunkin77

Tue Jun 19, 2007 6:16 am
Forum: Problem Solving
Topic: ps question
Replies: 2
Views: 1736

PREP

Problem Solving

you're right - thank you:)

by dunkin77

Tue Jun 19, 2007 5:58 am
Forum: Problem Solving
Topic: PREP
Replies: 5
Views: 6154

PREP

Problem Solving

Sorry, I think I wrote it wrong. :oops:

It's 2^100 - 2^96 .

by dunkin77

Tue Jun 19, 2007 3:19 am
Forum: Problem Solving
Topic: PREP
Replies: 5
Views: 6154

prep

Data Sufficiency

Yes, OA is C. Thank you!

by dunkin77

Tue Jun 19, 2007 12:42 am
Forum: Data Sufficiency
Topic: prep
Replies: 3
Views: 2300

prep

Data Sufficiency
prep

Is lxl< 1?
(1) lx + 1l = 2lx - 1l
(2) lx - 3l &#8800; 0


I thought was B but the answer is different... can anyone help?

by dunkin77

Mon Jun 18, 2007 3:25 pm
Forum: Data Sufficiency
Topic: prep
Replies: 3
Views: 2300

PREP

Problem Solving
PREP

What is the greatest prime factor of 2^100 - 2^96?

A. 2
B. 3
C. 5
D. 7
E. 11


CAN ANYONE HELP?

by dunkin77

Mon Jun 18, 2007 3:22 pm
Forum: Problem Solving
Topic: PREP
Replies: 5
Views: 6154

DS question

Data Sufficiency

I also thought it was E but the answer seems to be C...

by dunkin77

Mon Jun 18, 2007 8:37 am
Forum: Data Sufficiency
Topic: DS question
Replies: 9
Views: 2619