GRE Problem Solving Select Many Sample Questions
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1. Question:
A sum is invested such that it increases by 12% of itself in every
year. Which of the following is true? Indicate all such choices.
A. If $3500 is invested, it becomes more than $4000 in two years.
B. If $3500 is invested in 1992, it becomes $4390.40 in 1994
C. If $x is invested in 2000, it becomes more than twice itself in 3 years
D. The interest is added to the principle every year.
E. The principle remains the same year after year.
Correct Answer:
A, B and E
Explanation:
The interest here is compounded annually.
Let the sum be P, R and T be the rate of interest and time respectively.
For $3500 invested for 2 years, we have
Amount=P(1+R/100)^T
=3500(1+12/100)^2
=3500(112/100)^2
=$4390.40
The options A and B are both true.
For Rs. 2000 invested for 3 years, we have
Amount=2000(1+12/100)^3
=2000(112/100)^3
=2809.85
The option C is false.
Since the sum increases by 12% of itself every year, the interest is
added to the principle to calculate the interest every successive year.
Option D is true and E is false.
[100^t=100*100*….t times]
2. Question:
A clock gains 10 minutes every 24 hours. It is set right on Monday
at 8 a.m. Which of the following statements is true? Indicate all
correct choices.
A. It gains 30 minutes by Wednesday at 8 am
B. It gains 1 hour in one week
C. It shows 7.50 am on Tuesday at 8 am
D. It shows 8.10 am on Tuesday at 8 am
E. It gains more than one hour in one week
Correct Answer:
D and E
Explanation:
The clock gains 10 minutes in 24 hours.
Hence, it gains 30 minutes in 24*3=72 hours.
It gains 30 minutes by Thursday at 8 am
Option A is false.
It gains 10 minutes every day and hence it gains 10*7=70 minutes in a week.
Option B is false and E is true.
The clock gains 10 minutes and hence on Tuesday it shows 8.10 am at 8 am.
Option C is false and D is true.
3. Question:
12th January 1997 was a Sunday. Which of the following is true? Indicate all correct options.
A. 12th January 1996 was a Sunday
B. 12th January 1999 will be a Tuesday
C. 10th January 1999 will be a Sunday
D. 7th January 2000 will be a Saturday
E. 7th January 2001 will be a Sunday
Correct Answer:
B, C and E
Explanation:
12th January 1997 was a Sunday
12th January 1996 was a Friday, since 1996 was a leap year. Hence,
the same date in the consecutive year would be two days ahead.
12th January 1999 will be a Tuesday since it would be a Monday in 1998 and hence a Tuesday in 1999.
10th January 1999 will be a Sunday since 12th January 1999 will be a Tuesday.
Option A is false and B and C are true.
7th January 1997 will be a Tuesday. 7th Jan 2000 would be a Friday.
7th January 2001 would be a Sunday since 2000 is a leap year.
Option D is false and E is true.
GRE Problem Solving Select Many Sample Questions
Click for More GRE Problem Solving Select Many Sample Questions
GRE Problem Solving Select Many Sample Questions 1 | GRE Problem Solving Select Many Sample Questions 2 | GRE Problem Solving Select Many Sample Questions 3 | GRE Problem Solving Select Many Sample Questions 4 | GRE Problem Solving Select Many Sample Questions 5 | GRE Problem Solving Select Many Sample Questions 6 | GRE Problem Solving Select Many Sample Questions 7 | GRE Problem Solving Select Many Sample Questions 8 | GRE Problem Solving Select Many Sample Questions 9 | GRE Problem Solving Select Many Sample Questions 10
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