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A virus sample multiplies itself by becoming \(16\) times itself every hour. But due to anti-agent present in the system
Problem Solving
Re: A virus sample multiplies itself by becoming \(16\) times itself every hour. But due to anti-agent present in the sy
A virus sample multiplies itself by becoming \(16\) times itself every hour. But due to anti-agent present in the system, only half of them survive every hour. If we start with \(x\) number of virus and after the \(8\) hours there are \(2^{40}\) viruses, what is the value of \(x?\) A. \(2^{16}\) B....
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:12 am- Forum: Problem Solving
- Topic: A virus sample multiplies itself by becoming \(16\) times itself every hour. But due to anti-agent present in the system
- Replies: 2
- Views: 45
If Ben were to lose the championship, Mike would be the winner with a probability of \(\dfrac14,\) and Rob \(-\dfrac13.\
Problem Solving
Re: If Ben were to lose the championship, Mike would be the winner with a probability of \(\dfrac14,\) and Rob \(-\dfrac
If Ben were to lose the championship, Mike would be the winner with a probability of \(\dfrac14,\) and Rob \(-\dfrac13.\) If the probability of Ben being the winner is \(\dfrac17,\) what is the probability that either Mike or Rob will win the championship? Assume that there can be only one winner. ...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:11 am- Forum: Problem Solving
- Topic: If Ben were to lose the championship, Mike would be the winner with a probability of \(\dfrac14,\) and Rob \(-\dfrac13.\
- Replies: 1
- Views: 29
Re: \(\dfrac{3.003}{2.002} =\)
\(\dfrac{3.003}{2.002} =\) A. \(1.05\) B. \(1.50015\) C. \(1.501\) D. \(1.5015\) E. \(1.5\) Answer: E Source: Official Guide Solution: Approximating, we have: 3/2 = 1.5 Note that the quotient of 3.003/2.002 is exactly 1.5. Since half of 2.002 is exactly 1.001, when me multiply 2.002 by 1.5, we obta...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:10 am- Forum: Problem Solving
- Topic: \(\dfrac{3.003}{2.002} =\)
- Replies: 2
- Views: 33
Toshi is four times as old as Kosuke. In \(x\) years Toshi will be three times as old as Kosuke. How old is Kosuke, in
Problem Solving
Re: Toshi is four times as old as Kosuke. In \(x\) years Toshi will be three times as old as Kosuke. How old is Kosuke,
Toshi is four times as old as Kosuke. In \(x\) years Toshi will be three times as old as Kosuke. How old is Kosuke, in terms of \(x?\) (A) \(2x\) (B) \(3x\) (C) \(4x\) (D) \(8x\) (E) \(12x\) Answer: A Solution: If we let Kosuke’s current age = K, then Toshi’s current age = 4K. In x years, we have: ...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:09 am- Forum: Problem Solving
- Topic: Toshi is four times as old as Kosuke. In \(x\) years Toshi will be three times as old as Kosuke. How old is Kosuke, in
- Replies: 2
- Views: 29
7 teams compete in a track competition. If there are 20 events in the competition, no event ends in a tie, and no team
Problem Solving
Re: 7 teams compete in a track competition. If there are 20 events in the competition, no event ends in a tie, and no te
7 teams compete in a track competition. If there are 20 events in the competition, no event ends in a tie, and no team wins more than 3 events, what is the minimum possible number of teams that won at least one event? A. 3 B. 4 C. 5 D. 6 E. 7 Answer: E Solution: Let’s say that 6 teams won (the maxi...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:08 am- Forum: Problem Solving
- Topic: 7 teams compete in a track competition. If there are 20 events in the competition, no event ends in a tie, and no team
- Replies: 2
- Views: 24
If Jake loses 8 pounds, he will weigh twice as much as his sister. Together they now weigh 278 pounds. What is Jake's
Problem Solving
Re: If Jake loses 8 pounds, he will weigh twice as much as his sister. Together they now weigh 278 pounds. What is Jake'
If Jake loses 8 pounds, he will weigh twice as much as his sister. Together they now weigh 278 pounds. What is Jake's present weight, in pounds? (A) 131 (B) 135 (C) 139 (D) 147 (E) 188 Answer: E Solution: We let J = Jake’s current weight and S = Sister’s current weight, in pounds, and create the eq...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:07 am- Forum: Problem Solving
- Topic: If Jake loses 8 pounds, he will weigh twice as much as his sister. Together they now weigh 278 pounds. What is Jake's
- Replies: 2
- Views: 29
A foreign language club at Washington Middle School consists of \(n\) students, \(\dfrac25\) of whom are boys. All of
Problem Solving
Re: A foreign language club at Washington Middle School consists of \(n\) students, \(\dfrac25\) of whom are boys. All o
A foreign language club at Washington Middle School consists of \(n\) students, \(\dfrac25\) of whom are boys. All of the students in the club study exactly one foreign language. \(\dfrac13\) of the girls in the club study Spanish and \(\dfrac56\) of the remaining girls study French. If the rest of...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:06 am- Forum: Problem Solving
- Topic: A foreign language club at Washington Middle School consists of \(n\) students, \(\dfrac25\) of whom are boys. All of
- Replies: 2
- Views: 40
If \(a\) is the units digit of \(7^{47}\) and \(b\) is the rightmost nonzero digit in \(125^{10}\cdot 28^{15}.\) What
Problem Solving
Re: If \(a\) is the units digit of \(7^{47}\) and \(b\) is the rightmost nonzero digit in \(125^{10}\cdot 28^{15}.\) Wha
If \(a\) is the units digit of \(7^{47}\) and \(b\) is the rightmost nonzero digit in \(125^{10}\cdot 28^{15}.\) What is the value of \(a+b?\) A) 1 B) 2 C) 5 D) 6 F) 8 Answer: D Solution: Recall the units digit pattern of powers of 7 is 7-9-3-1. Since the exponent 47 is 3 more than a multiple of 4,...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:04 am- Forum: Problem Solving
- Topic: If \(a\) is the units digit of \(7^{47}\) and \(b\) is the rightmost nonzero digit in \(125^{10}\cdot 28^{15}.\) What
- Replies: 1
- Views: 22
A farmer spent $35 on feed for chickens and goats. He spent 40% money on chicken feed, which he bought at a 20% discount
Problem Solving
Re: A farmer spent $35 on feed for chickens and goats. He spent 40% money on chicken feed, which he bought at a 20% disc
A farmer spent $35 on feed for chickens and goats. He spent 40% money on chicken feed, which he bought at a 20% discount off the full price, and spent the rest on goat feed, which he bought at full price. If the farmer had paid full price for both the chicken feed and the goat feed, what amount wou...
- by Scott@TargetTestPrep
Thu Sep 24, 2020 7:01 am- Forum: Problem Solving
- Topic: A farmer spent $35 on feed for chickens and goats. He spent 40% money on chicken feed, which he bought at a 20% discount
- Replies: 1
- Views: 24
If \(x\) is not equal to \(0\) and \(x^y=1,\) then which of the following must be true?
Problem Solving
Re: If \(x\) is not equal to \(0\) and \(x^y=1,\) then which of the following must be true?
If \(x\) is not equal to \(0\) and \(x^y=1,\) then which of the following must be true? I. \(x=1\) II. \(x=1\) and \(y=0\) III. \(x=1\) or \(y=0\) A. I only B. II only C. III only D. I and III only E. None Answer: E Source: GMAT Club Tests Solution: If x is 1, then y can be any number. So statement...
- by Scott@TargetTestPrep
Mon Sep 21, 2020 6:31 am- Forum: Problem Solving
- Topic: If \(x\) is not equal to \(0\) and \(x^y=1,\) then which of the following must be true?
- Replies: 1
- Views: 30
Working at their normal constant rates, 20 diggers can dig a 100-meter long trench in hard soil in 3 days. A constructio
Problem Solving
Re: Working at their normal constant rates, 20 diggers can dig a 100-meter long trench in hard soil in 3 days. A constru
Working at their normal constant rates, 20 diggers can dig a 100-meter long trench in hard soil in 3 days. A construction company ordered the diggers to dig a 180-meter long trench in soft soil. If diggers can work 20% faster in soft soil than in hard soil, how many diggers are required to complete...
- by Scott@TargetTestPrep
Mon Sep 21, 2020 6:30 am- Forum: Problem Solving
- Topic: Working at their normal constant rates, 20 diggers can dig a 100-meter long trench in hard soil in 3 days. A constructio
- Replies: 1
- Views: 31
Starting with 0, a mathematician labels every non-negative integer as one of five types: alpha, beta, gamma, delta, or
Problem Solving
Re: Starting with 0, a mathematician labels every non-negative integer as one of five types: alpha, beta, gamma, delta,
Starting with 0, a mathematician labels every non-negative integer as one of five types: alpha, beta, gamma, delta, or epsilon, in that repeating order as the integers increase. For instance, the integer 8 is labeled delta. What is the label on an integer that is the sum of a gamma raised to the se...
- by Scott@TargetTestPrep
Mon Sep 21, 2020 6:29 am- Forum: Problem Solving
- Topic: Starting with 0, a mathematician labels every non-negative integer as one of five types: alpha, beta, gamma, delta, or
- Replies: 1
- Views: 41
The variable \(x\) takes on integer values between \(1\) and \(7\) inclusive as shown above. What is the probability
Problem Solving
Re: The variable \(x\) takes on integer values between \(1\) and \(7\) inclusive as shown above. What is the probability
\(x\) frequency 1 3 2 1 3 3 4 1 5 3 6 1 7 3 The variable \(x\) takes on integer values between \(1\) and \(7\) inclusive as shown above. What is the probability that the absolute value of the difference between the mean of the distribution which is \(4\) and a randomly chosen value of \(x\) will be...
- by Scott@TargetTestPrep
Mon Sep 21, 2020 6:28 am- Forum: Problem Solving
- Topic: The variable \(x\) takes on integer values between \(1\) and \(7\) inclusive as shown above. What is the probability
- Replies: 1
- Views: 30
If the average (arithmetic mean) of \(5\) positive temperatures is \(x\) degrees Fahrenheit, then the sum of the \(3\)
Problem Solving
Re: If the average (arithmetic mean) of \(5\) positive temperatures is \(x\) degrees Fahrenheit, then the sum of the \(3
If the average (arithmetic mean) of \(5\) positive temperatures is \(x\) degrees Fahrenheit, then the sum of the \(3\) greatest of these temperatures, in degrees Fahrenheit, could be: A. \(6x\) B. \(4x\) C. \(\dfrac{5x}3\) D. \(\dfrac{3x}2\) E. \(\dfrac{3x}5\) Answer: B Source: GMAT Paper Tests Sol...
- by Scott@TargetTestPrep
Mon Sep 21, 2020 6:27 am- Forum: Problem Solving
- Topic: If the average (arithmetic mean) of \(5\) positive temperatures is \(x\) degrees Fahrenheit, then the sum of the \(3\)
- Replies: 1
- Views: 30
Lucy deposited $62500 in an investment fund that provided 16 percent annual return compounded quarterly. If she made no
Problem Solving
Re: Lucy deposited $62500 in an investment fund that provided 16 percent annual return compounded quarterly. If she made
Lucy deposited $62500 in an investment fund that provided 16 percent annual return compounded quarterly. If she made no other transactions with the fund, in how much time, in months, did her investment earn a total interest of $5100? A. 0.5 B. 2 C. 3 D. 6 E. 6.1 Answer: D Solution: Since the annual...
- by Scott@TargetTestPrep
Mon Sep 21, 2020 6:27 am- Forum: Problem Solving
- Topic: Lucy deposited $62500 in an investment fund that provided 16 percent annual return compounded quarterly. If she made no
- Replies: 1
- Views: 33