Search found 4190 matches


Re: Can someone help me with this problem?

1001^2 - 999^2 / 101^2 - 99^2 ? a) 10 b) 20 c) 40 d) 80 e) 100 Answer is a. Can someone please explain it. Thanks, Vito We can see that both the numerator and denominator are differences of two squares. Therefore, the numerator can be factored and simplified as: (1001 - 999)(1001 + 999) = 2(2000) =...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:41 am
Forum: Problem Solving
Topic: Can someone help me with this problem?
Replies: 7
Views: 3442

Re: Difficult Math Question #49 - Percentages

If 75% of a class answered the 1st question on a certain test correctly, 55% answered the 2nd question on the test correctly and 20% answered neither of the questions correctly, what percent answered both correctly? 10% 20% 30% 50% 65% We can use the formula: Total = First question + Second questio...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:40 am
Forum: Problem Solving
Topic: Difficult Math Question #49 - Percentages
Replies: 4
Views: 30264

Re: What is the value of m m in the equation below?

http://s33.postimg.org/42pke6jxn/Screen_Shot_2016_06_01_at_9_06_37_PM.jpg I'm having a hard time figuring out how to approach the first step in answering exponent questions, finding common bases in the above problem. Simplifying the equation, we have: 1/(5^m) * 1/(4^24) = 1/[2(10)^47] 1/(5^m * 2^48...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:39 am
Forum: Problem Solving
Topic: What is the value of m m in the equation below?
Replies: 6
Views: 2244

Re: Want simple explanation for this PS question on Ratios

The ratio of two positive numbers is 3 to 4. If k is added to each number the new ratio will be 4 to 5, and the sum of the numbers will be 117. What is the value of k? Ans Choices 1 13 14 18 21 OA 13 Not able to figure out on how my approach should be Regards, Dhiren Since the ratio of the numbers ...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:38 am
Forum: Problem Solving
Topic: Want simple explanation for this PS question on Ratios
Replies: 11
Views: 7832

Re: Consecutive Integers

For any positive integer n, the sum of the first n integers equals n(n+1)/2. What is the sum of all the even integers between 99 and 301. Would like a very thorough explanation of this problem. We are asked to find the sum of the even integers from 100 to 300 inclusive. We can use the following for...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:37 am
Forum: Problem Solving
Topic: Consecutive Integers
Replies: 10
Views: 6316

Re: If K is a common multiple of 75, 98, and 140,

If K is a common multiple of 75, 98, and 140, which of the following statements must be true? |) k is divisible by 9. ||) k is divisible by 49. |||) k is greater than 14,000. A) || only B) |||) only C) | and || only D) II and ||| only E) |,||, and ||| OA D Let’s prime factorize the numbers: 75 = 3 ...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:35 am
Forum: Problem Solving
Topic: If K is a common multiple of 75, 98, and 140,
Replies: 3
Views: 2112

Re: probability that the marble selected will be purple?

On a store counter are exactly two boxes containing only purple marbles and yellow marbles. Box A has 30 purple marbles and 20 yellow marbles; box B has 15 purple marbles and 35 yellow marbles. If Melanie randomly selects one of the boxes and then randomly selects one marble from that box, what is ...


Re: Which of the following is the closest to...

Which of the following is the closest to 11*10^10–4*10^4 ? A. 10^2 B. 10^7 C. 10^8 D. 10^9 E. 10^11 OA is E . What are the calculus to determine the correct answer? Since 4*10^4 is relatively small when compared to 11*10^10, then the difference would still be close to 11*10^10, which is approxima...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:33 am
Forum: Problem Solving
Topic: Which of the following is the closest to...
Replies: 2
Views: 222

Re: The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to w

The ratio of men to women in a class is 6 to 5. If 2 men and 1 woman drop out of the class and the ratio of men to women after the drop out is 8 to 7, then how many men are currently in the class? A. 14 B. 16 C. 18 D. 20 E. 22 OA C Source: Princeton Review The ratio 6 : 5 can be re-expressed as 6x ...


Re: In 1995 a certain store had 1,800 tools in stock that had been purchased for $30 each...

GMAT Prep In 1995 a certain store had 1,800 tools in stock that had been purchased for $30 each. If 1,000 of these tools were sold in 1995 for $40 each and the remaining 800 were sold in 1996 for $50 each, how many greater was the gross profit on the tools sold in 1996 than the gross profit on thos...


Re: PS Percentage

A salesperson received a 6-percent commission on the amount of sales up to and including $10,000, and r-percent commission on the maont of total sales over $10,000. If the salesperson received a total commission of $920 on total sales of $14,000, what was the value of r? A. 3.2 B. 4.3 C. 6.6 D. 8.0...

by Scott@TargetTestPrep

Mon Feb 17, 2020 3:27 am
Forum: Problem Solving
Topic: PS Percentage
Replies: 2
Views: 5152

Re: Problem solving : profit and loss

A trader mixes 26kg of rice at $20 per kg with 30kg of other variety at $36 per kg and sells the mixture at $30per kg. His profit % is A zero B 5 C 8 D 10 E -4 The cost is 26 x 20 + 30 x 36 = 520 + 1080 = $1600. The revenue is 30 x (26 + 30) = 30 x 56 = $1680. Therefore, the profit is 1680 - 1600 =...

by Scott@TargetTestPrep

Sun Feb 16, 2020 7:54 am
Forum: Problem Solving
Topic: Problem solving : profit and loss
Replies: 6
Views: 1155

Re: Problem Solving

17. If b and c are positive numbers and 1/b=b/c=c/8 , then b + c = (A) 4 (B) 6 (C) 7 (D) 8 (E) 9 We see that the equation can be re-expressed as three separate equations: 1/b = b/c, b/c = c/8, and 1/b = c/8. Using the first equation, we have: 1/b = b/c b^2 = c Using the third equation, we have: 1/b...

by Scott@TargetTestPrep

Sun Feb 16, 2020 7:46 am
Forum: Problem Solving
Topic: Problem Solving
Replies: 6
Views: 3426

Re: Fence posts problem

Q.) A rectangular pasture has fence posts along every side at 15-foot intervals. If there are 6 fence posts along the length of the pasture and the perimeter of the pasture is 240 feet, how many fence posts would surround this pasture if the width were doubled? (Assume that the space taken up by th...

by Scott@TargetTestPrep

Sun Feb 16, 2020 7:45 am
Forum: Problem Solving
Topic: Fence posts problem
Replies: 7
Views: 4026

Re: Consecutive integers

From the consecutive integers -10 to 10, inclusive, 20 integers are randomly chosen with repetitions allowed. What is the least possible value of the product of the 20 integers? A) (-10)^20 B) (-10)^10 C) 0 D) -(10)^19 E) -(10)^20 Answer: E This problem is testing our knowledge of the multiplicatio...

by Scott@TargetTestPrep

Sun Feb 16, 2020 7:41 am
Forum: Problem Solving
Topic: Consecutive integers
Replies: 5
Views: 826