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If P is a set of integers and 3 is in P, is every positive multiple of 3 in P? (1) For any integer in P, the sum of 3 and that integer is also in P. (2) For any integer in P, that integer minus 3 is also in P. What's the best way to determine which statement is sufficient? Can any experts show? Sta...


If 9^y + 3^b = 10*3^b, then 2y =' (A) b – 2 (B) b – 1 (C) b (D) b + 1 (E) b + 2 OA is E Please Expert, can you help me out with this problem<i class="em em-expressionless"></i>? Thanks This could have been depicted a little more cleanly. Let's assume the initial equation is 9^y + 3^b = 10 * (3^...

by [email protected]

Thu Mar 01, 2018 12:48 pm
Forum: Problem Solving
Topic: If 9^y + 3^b = 10*3^b, then 2y ='
Replies: 5
Views: 736

A certain truck uses 18 gallons fuel in traveling 270 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck's fuel mileage be increased? A. 8 B. 9 C. 12 D. 15 E. 27 The OA is C . I'm really confused by this PS question...


If k is a positive integer and m is the product of the first 40 positive integers, what is the value of k ? (1) 10^k is a factor of m. (2) 10^k is a factor of n, where n is the product of the first 9 positive integers. The OA is the option B . Using the statement (2), I don't need to use m? I am co...


Who types at a faster rate, John or Bob? (1) The difference between their typing rates is 1 word per minute (2) Bob types at a rate of 80 words per minute Which of the statements is sufficient? OA E Statement 1: Knowing the difference doesn't tell us who's faster --> not sufficient Statement 2: not...

by [email protected]

Wed Feb 28, 2018 5:47 pm
Forum: Data Sufficiency
Topic: Who types at a faster rate, John or Bob
Replies: 1
Views: 570

A men's basketball league assigns every player a two-digit number for the back of his jersey. If the league uses only the digits 1-5, what is the maximum number of players that can join the league such that no player has a number with a repeated digit (e.g. 22), and no two players have the same num...

by [email protected]

Wed Feb 28, 2018 5:43 pm
Forum: Problem Solving
Topic: A men's basketball league assigns every player
Replies: 2
Views: 581

The ratio of local and international calls made by Amy this week is 5 to 2. If the ratio changes to 5 to 3 after Amy makes three more international calls, how many local calls did Amy make this week? A. 3 B. 5 C. 10 D. 15 E. 21 The OA is D . Local international ratio 5x/2x. Then local international...


During the first two weeks of January, the total rainfall in Springdale was 15 inches. If the rainfall during the second week was 1.5 times the rainfall during the first week, what was the rainfall during the second week of January? A. 5 inches B. 6 inches C. 9 inches D. 10 inches E. 12 inches The ...


The speed of a subway train is represented by the equation z=s^2+2s for all situations where 0 ≤ s ≤ 7, where z is the rate of speed in kilometers per hour and s is the time in seconds from the moment the train starts moving. In kilometers per hour, how much faster is the subway train moving af...


Leon, Billy, and Jim ate an astounding total of 78 hot dogs in a hot dog eating contest. If Jim ate four times as many hot dogs as Leon but half as many hot dogs as Billy, how many more hot dogs did Billy eat than Leon? A. 13 B. 20 C. 39 D. 42 E. 60 The OA is D . I'm confused by this PS question. E...


Angela has 15 pairs of matched socks. If she loses 7 individual socks, which of the following is NOT a possible number of matched pairs she has left? A. 8 B. 9 C. 10 D. 11 E. 12 The OA is E . I think if Angela loses 7 individual socks, then she is bound to have lost minimum of 3 pairs and 1 individ...

by [email protected]

Sun Feb 25, 2018 11:07 am
Forum: Problem Solving
Topic: Agela has 15 pairs of matched socks. If she loses 7...
Replies: 4
Views: 601

Five drainage pipes, each draining water from a pool at the same constant rate, together can drain a certain pool in 12 days. How many additional pipes, each draining water at the same constant rate, will be needed to drain the pool in 4 days? A) 6 B) 9 C) 10 D) 12 E) 15 The OA is C . Is there a st...


At least how many grams of pure bronze must be alloyed with 387 grams of pure copper to create an alloy that is no more than 90% copper? A. 13 B. 43 C. 103 D. 348 E. 430 The OA is B . Please, can any expert explain this PS question for me? I tried the following, Can I say that 387 + x grams = y gra...

by [email protected]

Fri Feb 23, 2018 9:21 am
Forum: Problem Solving
Topic: At least how many grams of pure bronze must be...
Replies: 2
Views: 571

Pat invest x dollars in a fund that paid 8 percent annual interest, compounded annually. Which of the following represents the value, in dollars, of Pat's investment plus interest at the end of 5 years? $$A.\ 5\left(0.08x\right)$$ $$B.\ 5\left(1.08x\right)$$ $$C.\ \left(1+5\left(0.08x\right)\right)...


Three pounds of raisins and 4 pounds of corn flakes are used to make a large bag of breakfast cereal. Raisins cost $1.11 per pound and flakes cost $0.90 per pound. What most the grocer charge for a pound of the cereal to make a profit of 21 cents per pound? A. $0.99 B. $1.00 C. $1.07 D. $1.20 E. $1...