GRE Numeric Entry SAMPLE QUESTIONS-5
GRE Numeric Entry Sample Questions
GRE Numeric Entry Sample Questions 1 | GRE Numeric Entry Sample Questions 2 | GRE Numeric Entry Sample Questions 3 | GRE Numeric Entry Sample Questions 4 | GRE Numeric Entry Sample Questions 5 | GRE Numeric Entry Sample Questions 6 | GRE Numeric Entry Sample Questions 7 | GRE Numeric Entry Sample Questions 8 | GRE Numeric Entry Sample Questions 9 | GRE Numeric Entry Sample Questions 10
1. Question :Find the value of (n-r), when 7/2<(r+5)/2<=4 and P(n,r)=60
Correct Answer: 2
Explanation:7/2<(r+5)/2<=4
7<r+5
7-5
2
r=3
P(n,r)=60
n!/(n-r)! = 60
n!(n-3)!=60
n(n-1)(n-2)(n-3)!/(n-3)!=60
n(n-1)(n-2)=60
5*4*3=60
n=5
Hence, (n-r)=5-3
=2
2. Question :Find the least possible value of x, (5x-2)/3-(7x-3)/5>=x/4
Correct Answer: 4
Explanation:(5x-2)/3-(7x-3)/5>=x/4
(25x-10-21x+9)/15>=x/4
(4x-1)/15>=x/4
4(4x-1)>=15x
16x-4>=15x
x>=4
Hence, the least possible value of x is 4.
3. Question :Find the value of k for which the equations have infinite solutions.
(k-3)x+3y=k and kx+ky=12
Correct Answer: 6
Explanation:For infinite solutions, we have the condition
(k-3)/k=3/k=k/12
(k-3)/k=3/k and 3/k=k/12
k(k-3)=3k and 3*12=k*k
k^2-3k=3k and k^2=36
k^2=6k and k=-6,6
k=0, 6 and k = -6, 6
k = 6
GRE Numeric Entry Sample Questions
GRE Numeric Entry Sample Questions 1 | GRE Numeric Entry Sample Questions 2 | GRE Numeric Entry Sample Questions 3 | GRE Numeric Entry Sample Questions 4 | GRE Numeric Entry Sample Questions 5 | GRE Numeric Entry Sample Questions 6 | GRE Numeric Entry Sample Questions 7 | GRE Numeric Entry Sample Questions 8 | GRE Numeric Entry Sample Questions 9 | GRE Numeric Entry Sample Questions 10