QUESTION: 205

A newly wed couple is designing their new house by purchasing 10 chairs, 3 desks, 3 televisions and 4 closets. If the price ratio between the new merchandise is 1 : 3 : 4 : 4, what fraction of the cost of the entire purchase was the cost of a desk and a closet?

6/31.
7/47.
5/28.
9/43.
11/45.

Answer(s): B

Explanation:

Let X be the price of a single chair, normalize all the prices to the price of a chair. The total price of the entire purchase is: 10X + 9X + 12X + 16X = 47X.
The specific purchase costs: 3X + 4X = 7X. The percent required is 7/47.

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QUESTION: 206

A grocery store ordered a delivery of fresh milk products that contained 45 milk bottles, 24 cheese packs and 23 cartons of chocolate milk. If the chocolate milk carton costs like a bottle of milk, which is three times the price of a cheese pack, what fraction of the cost of the entire purchase was the cost of 20 bottles of milk, 1 pack of cheese and 5 chocolate milk cartons?

1/6.
2/5.
1/4.
1/3.
3/7.

Answer(s): D

Explanation:

Let X is the price of a pack of cheese.
The price of the entire purchase is (45 x 3)X + 24X + (23 x 3)X = 228X. The specific required purchase is 60X + X + 15X = 76X.
The fraction of the specific purchase and the entire purchase is 76/228 = 1/3.

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QUESTION: 207

If A and B are two prime numbers bigger than 2, which of the following can't be true?

(1) A + B is an even number.
(2) A x B is also a prime number.
(3) AB is also a prime number.

1 only.
2 only.
3 only.
2 and 3 only.
1, 2 and 3.

Answer(s): D

Explanation:

Try to find opposing examples to the statements.
1. Pick A=7, B=13 A+B = 20, this is an even number.
2. Try A=3, B=7 AB=21, and 21 is not a prime number.
3. Try A=3, B=5 AB = 35= 3 x 3 x 3 x 3 x 3 = a number which is dividable by 3 and 9 and therefore is not a prime number. Statements 2 and 3 can't be true, the answer is D.

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QUESTION: 208

If X and Y are consecutive numbers (Y>X), which of the following statements could be false?
1. The multiplication XY is an even number. 2. (Y/X) > 1.
3. (X + Y) is always an odd number.

1 only.
2 only.
1 and 2 only.
1 and 3 only.
1, 2 and 3.

Answer(s): B

Explanation:

Let's go over each statesman's at a time.
1, the multiplication of two consecutive numbers is always an even number.
2, Try x=2, y=3 In this case 3/2 is bigger than 1 but if you choose x=-3, y=-2, y/x is 2/3 and that’s smaller than
1. Therefore, this statement is not always true.
3, the sum of two consecutive numbers is always odd, try some numbers. Therefore, only statement 2 is false.

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Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 52)

QUESTION: 205

Explanation:

QUESTION: 206

Explanation:

QUESTION: 207

Explanation:

QUESTION: 208

Explanation: