Search found 40 matches
Please help on this one The sum of the first 50 positive even integers is 2550. what is the sum of the even integers from 102 to 200 inclusive? A. 5100 B. 7550 C. 10100 D. 15500 E. 20100 100*50 +2550 = 7550 Osirus, i found your approach very interesting. I think you would have fit with the answer B...
- by imane81
Fri Feb 19, 2010 5:43 pm- Forum: Problem Solving
- Topic: The sum of the first 50 positive even integers is 2550. what
- Replies: 9
- Views: 16867
According to the directions on a can of orange juice concent
Please help on this one... According to the directions on a can of orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make orange juice. How many 12 ounce cans of the concentrate are required to prepare 200 6 ounce servings of orange juice. A. 25 B. 34 C. 50 D. 67 ...
- by imane81
Thu Feb 18, 2010 7:35 pm- Forum: Problem Solving
- Topic: According to the directions on a can of orange juice concent
- Replies: 10
- Views: 8688
The temperature of a certain cup of coffee 10 minutes it was
Please help on this one The temperature of a certain cup of coffee 10 minutes it was poured was 120 degree Fahrenheit> If temperature F of the coffee t minutes after it was poured can be determined by the formula F = 120*(2^-at) + 60where F is in degree Fahrenheit and a is a constant , then the temp...
- by imane81
Thu Feb 18, 2010 12:29 pm- Forum: Problem Solving
- Topic: The temperature of a certain cup of coffee 10 minutes it was
- Replies: 8
- Views: 17120
What is the greatest prime factor of 4^17 - 2^28?
Please help on this one
What is the greatest prime factor of 4^17 - 2^28?
A. 2
B. 3
C. 5
D. 7
E. 11
- by imane81
Thu Feb 18, 2010 12:25 pm- Forum: Problem Solving
- Topic: What is the greatest prime factor of 4^17 - 2^28?
- Replies: 10
- Views: 9617
The sum of the first 50 positive even integers is 2550. what
Please help on this one
The sum of the first 50 positive even integers is 2550. what is the sum of the even integers from 102 to 200 inclusive?
A. 5100
B. 7550
C. 10100
D. 15500
E. 20100
- by imane81
Thu Feb 18, 2010 12:23 pm- Forum: Problem Solving
- Topic: The sum of the first 50 positive even integers is 2550. what
- Replies: 9
- Views: 16867
What is the greatest possible area of a triangle region with
Please advise on this one
What is the greatest possible area of a triangle region with one vertex at the center of a circle of radius 1 and the other 2 vertices on the circle?
A. sqrt(3)/4
B. 1/2
C. pi/4
D. 1
E. sqrt(2)
- by imane81
Thu Feb 18, 2010 12:21 pm- Forum: Problem Solving
- Topic: What is the greatest possible area of a triangle region with
- Replies: 2
- Views: 5684
- by imane81
Wed Feb 17, 2010 4:34 pm- Forum: Problem Solving
- Topic: (2^12 - 2^6) / (2^6 - 2^3) =
- Replies: 9
- Views: 1970
From a bag containing 12 identical blue balls, y identical y
Thank you for advising on this one... From a bag containing 12 identical blue balls, y identical yellow balls, and no other balls, one ball will be removed at random. If the probability is less than 2/5 that the removed ball will be blue, what is the least number of yellow balls that must be in the ...
- by imane81
Wed Feb 17, 2010 12:25 pm- Forum: Problem Solving
- Topic: From a bag containing 12 identical blue balls, y identical y
- Replies: 6
- Views: 7443
Six machines each working at same constant rate together can
Thanks for helping on this one
Six machines each working at same constant rate together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate will be needed to complete the job in 8 days ?
A. 2
B. 3
C. 4
D. 6
E. 8
- by imane81
Wed Feb 17, 2010 12:20 pm- Forum: Problem Solving
- Topic: Six machines each working at same constant rate together can
- Replies: 23
- Views: 18232
For which of the following function f is f(x)=f(1-x)
Thanks for helping on this one..
For which of the following function f is f(x)=f(1-x) , for all x?
A. f(x) = 1-x
B. f(x) = 1-x^2
C. f(x) = x^2-(1-x)^2
D. f(x) = x^2(1-x)^2
E. f(x) = x/(1-x)
- by imane81
Wed Feb 17, 2010 12:17 pm- Forum: Problem Solving
- Topic: For which of the following function f is f(x)=f(1-x)
- Replies: 2
- Views: 7023
If each term in the sum a1+a2+a3+.....+an is either 7 or 77
Your help in this one is much appreciated..
If each term in the sum a1+a2+a3+.....+an is either 7 or 77 and the sum equals 350, which of the following could be equal to n?
A. 38
B.39
C.40
D.41
E.42
- by imane81
Wed Feb 17, 2010 12:13 pm- Forum: Problem Solving
- Topic: If each term in the sum a1+a2+a3+.....+an is either 7 or 77
- Replies: 3
- Views: 6591
Circular gears P and Q start rotating at the same time at co
thank you for your help on this one... Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute and gear Q makes 40 revolutions per minute. How many seconds after the gears start rotating will gear Q have made exactly 6 more revolutions than g...
- by imane81
Wed Feb 17, 2010 12:07 pm- Forum: Problem Solving
- Topic: Circular gears P and Q start rotating at the same time at co
- Replies: 4
- Views: 8339
For every positive integer n, the function h(n) is defined t
Thank you for your input on this one For every positive integer n, the function h(n) is defined to be the product of all the even integers from 2 to n, inclusive. If p is the smallest prime factor of h(100)+1, then p is A. Between 2 and 10 B.Between 10 and 20 C.Between 20 and 30 D.Between 30 and 40 ...
- by imane81
Wed Feb 17, 2010 12:04 pm- Forum: Problem Solving
- Topic: For every positive integer n, the function h(n) is defined t
- Replies: 4
- Views: 6828
Stations X and Y are connected by two separate, straight, pa
please help on this one Stations X and Y are connected by two separate, straight, parallel rail lines that are 250 miles long. Train P and train Q simultaneously left station X and station Y, respectively, and each train traveled to the other's points of departure.The 2 trains passed each other afte...
- by imane81
Tue Feb 16, 2010 4:34 pm- Forum: Data Sufficiency
- Topic: Stations X and Y are connected by two separate, straight, pa
- Replies: 10
- Views: 6643
absolute value
if absolute value(d-9) = 2d, then d=
a. -9
b.-3
c.1
d.3
e.9
The right answer is -9 or 3??
i would go for answer a which is d= -9 but please confirm
would actually like to know if an absolute value should always be taken for its positive value as it is a distance and a distance is always positive
- by imane81
Tue Feb 16, 2010 1:39 pm- Forum: Problem Solving
- Topic: absolute value
- Replies: 4
- Views: 1162