GRE Numeric Entry SAMPLE QUESTIONS-7
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 :A's expenses are 20% less than B's expenses. How much percent more are B's expenses than A's expenses?
Correct Answer: 25%
Explanation:Let the expenses of A and B be x and y respectively.
x=y-20% of y
x=y-20y/100
x=(100y-20y)/100
x=80y/100
y=100/80x
Required percentage = (y-x)/x*100
= (100x/80-x)/x*100
= (100x-80x)/(80x)*100
=20/80*100
= 25%
2. Question :The breadth of a rectangle becomes one and a half times itself and the length increases by 40%. What is the percentage change in the area of the rectangle?
Correct Answer: 110%
Explanation:Let the original length and breadth be l and b respectively
Area = l*b
New length = l+40% of l
= l+40l/100
=140l/100
New breadth = (1+1/2)b
= 3b/2
New area= 140l/100*3b/2
= 140*3lb/200
= 21lb/10
Percentage increase=increase/original area*100
= (21lb/10 - lb)/lb*100
= (21-10)/10*100
= 1100/10=110%
3. Question :The volume of a cylindrical pipe is 17600 cc. Its height is 14cm and the external radius is 25cm. Find the thickness of the cylinder.
Correct Answer: 10 cm
Explanation:Volume of the cylindrical pipe = pi(R^2-r^2)h, where R and r are the external and internal radii and h is the height of the cylinder.
pi(R^2-r^2)h=17600
22/7(25^2-r^2)14=17600
22*2*(625-r^2) = 17600
r^2=625-400
r^2=225
r=sqrt(225)=15
R=25
r=15
Thickness = R-r
=25-15=10 cm
[x^2=x*x]
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