5
Q:

x = y - (50/y), where x and y are both > 0 

If the value of y is doubled in the equation above, the value of x will

A) decrease B) stay the same
C) increase four fold D) increase to more than double

Answer:   D) increase to more than double



Explanation:

The best approach is to pick a number that satisfies the rules that x and y are greater than 0. So for example you could choose 25 for y.

The value of x before doubling is then 25 - 50/25 = 23

The value after doubling y will be 50 - 50/50 = 49, which is more than double.

Subject: Numbers
Exam Prep: GRE
Q:

What is the sum of the first 11 terms of an arithmetic progression if the first term is -31 and last term is 29?

A) 42 B) -11
C) 28 D) 12
 
Answer & Explanation Answer: B) -11

Explanation:
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1 597
Q:

What is the sum of the first 11 terms of an arithmetic progression if the 4th term is 11 and the 7th term is -4?

A) -75 B) 55
C) 11 D) 100
 
Answer & Explanation Answer: C) 11

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0 585
Q:

What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?

A) 192 B) 230
C) 102 D) 214
 
Answer & Explanation Answer: C) 102

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Q:

What least number must be added to 4131, so that the sum is completely divisible by 19?

A) 10 B) 11
C) 9 D) 12
 
Answer & Explanation Answer: B) 11

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0 670
Q:

The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?

A) 34 B) 28
C) 25 D) 31
 
Answer & Explanation Answer: D) 31

Explanation:
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Q:

What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?

A) 104 B) 140
C) 84 D) 98
 
Answer & Explanation Answer: A) 104

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1 579
Q:

A number is greater than 58 times its reciprocal by 3/4. What is the number?

A) -8 B) 12
C) -12 D) 8
 
Answer & Explanation Answer: D) 8

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Q:

The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?

A) 28 B) 87
C) 51 D) 17
 
Answer & Explanation Answer: C) 51

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