Search found 15 matches


averages

If John makes a contributino to a charity fund at school, the average contribution size will increase by 50%, reaching $75 per person. If there were 5 other contributions made before John's, what is the size of his donation?

100
150
200
250
450

by imadummy

Thu Jul 31, 2008 9:39 am
Forum: Problem Solving
Topic: averages
Replies: 2
Views: 1729

Prime factor of big numbers?

What is the largest prime factor of 4^17 – 2^28?

1. 7

by imadummy

Thu Jul 31, 2008 9:18 am
Forum: Problem Solving
Topic: Prime factor of big numbers?
Replies: 3
Views: 2215

Function Q

The function F is defined for all positive integers N by the following rule: F(N) is the number of positive integers each of which is less than N and has no positive factor in common with N other than 1. If P is any prime number the F(P)= what?

The answer is P-1...help?!

by imadummy

Thu Jul 31, 2008 9:15 am
Forum: Problem Solving
Topic: Function Q
Replies: 1
Views: 1372

Thanks, guys. The stats stuff really throws me off.

by imadummy

Tue Jun 03, 2008 1:53 pm
Forum: Problem Solving
Topic: another stan dev problem
Replies: 4
Views: 2929

You were right on Red Sox. I took the discount amount of $2,400 instead of the $1,600 when I calculated the 25% profit.

by imadummy

Tue Jun 03, 2008 1:52 pm
Forum: Problem Solving
Topic: GMAT PS #2
Replies: 3
Views: 2969

Duh. Grrr. I knew that would be easy. Thanks.

by imadummy

Tue Jun 03, 2008 1:50 pm
Forum: Problem Solving
Topic: GMAT PS
Replies: 5
Views: 2547

GMAT PS #2

Whenever Bianca travels to Italy she brings back Gucci bags that she sells to her friends. The bags she buys in Italy she gets at a 60% discount to American prices. She sells the bags to her friends at a 25% higher price than what she paid for them. After one trip, she sells bags to her friends that...

by imadummy

Tue Jun 03, 2008 1:48 pm
Forum: Problem Solving
Topic: GMAT PS #2
Replies: 3
Views: 2969

GMAT PS

I bet this is kind of easy and I can solve by backsolving but was hoping for some help on the "real" way. A retailer has a sale on hooded sweatshirts. When you buy one you get a second identical sweatshirt for 25 percent. Andrew buys two and pays a total of 175 dollars. How much did he pay...

by imadummy

Tue Jun 03, 2008 1:36 pm
Forum: Problem Solving
Topic: GMAT PS
Replies: 5
Views: 2547

another stan dev problem

Set A consists of all prime numbers between 10 and 25; Set B consists of consecutive even integers, and Set C consists of consecutive multiples of 7. If all the three sets have an equal number of terms, which of the following represents the ranking of these sets in an ascending order of the standard...

by imadummy

Tue Jun 03, 2008 7:52 am
Forum: Problem Solving
Topic: another stan dev problem
Replies: 4
Views: 2929

VP Algebra Challenge

If 3^x*4^y=177147 and x-y=11, then x=?

undefined
0
11
177136
177158

by imadummy

Thu May 22, 2008 7:48 am
Forum: Problem Solving
Topic: VP Algebra Challenge
Replies: 3
Views: 1809

scientific notation

Please tell me plugging answers is the best way...


If (0.0015*10^m)/(0.03*10^k) = 5*10^7 then m-k=?

9
8
7
6
5

by imadummy

Thu May 22, 2008 7:46 am
Forum: Problem Solving
Topic: scientific notation
Replies: 4
Views: 4097

While I'm a Yankees fan, I appreciate the clear solution you gave RedSox man.

by imadummy

Wed May 21, 2008 8:04 am
Forum: Data Sufficiency
Topic: Integer ?s
Replies: 3
Views: 1500

Integer ?s

Help...

If x and y are integers, what is the value of y?

(1) xy = 27
(2) x = y^2

Answer [c] (?)

by imadummy

Wed May 21, 2008 7:55 am
Forum: Data Sufficiency
Topic: Integer ?s
Replies: 3
Views: 1500

Exponent ?s

From a Veritas Prep workbook:

For how many integers, n, does 2^n = n^2

A. Zero
B. One
C. Two
D. Four
E. Eight

by imadummy

Wed May 21, 2008 7:17 am
Forum: Problem Solving
Topic: Exponent ?s
Replies: 3
Views: 1874

Square and Squared roots

I'm not sure how some of these are squares....

Which of the following is NOT the square of an integer?

A. sqt(sqt(1))
B. sqt(4)
C. 18/2
D. 40-24
E. 36

ANS: B

by imadummy

Wed May 21, 2008 7:05 am
Forum: Problem Solving
Topic: Square and Squared roots
Replies: 1
Views: 1311