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?
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- by imadummy
Thu Jul 31, 2008 9:39 am- Forum: Problem Solving
- Topic: averages
- Replies: 2
- Views: 1729
- 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
- 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
- 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
- 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=?
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- by imadummy
Thu May 22, 2008 7:46 am- Forum: Problem Solving
- Topic: scientific notation
- Replies: 4
- Views: 4097
- 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