Quantitative Aptitude Practice Test for NIACL Assistants

QUANTITATIVE APTITUDE PRACTICE TEST
Directions(1-5): Study the following graph carefully and answer the questions given below.
Number of Students (in thousands) in three Schools over the years

1.What was the average number of students in all the Schools together in the year 2006?
a)30,000
b)9,000
c)3,000
d)6,000
e)None of these

2.Total number of students in School B and School C together in the year 2004 was approximately what percent of the total number of students in School B and School C together in the year 2007?
a)85%
b)80%
c)75%
d)184%
e)131%

3.How many times the total number of students in all the three Schools A, B and C together was exactly equal among the given years?
a)2
b)5
c)4
d)3
e)None of these

4.What was the approximately average number of students in School A over all the years together?
a)1990
b)2090
c)2300
d)1800
e)2700

5.What was the difference between the total number of students in all the schools together in the year 2003 and number of students in School B in the year 2005?
a)2000
b)3000
c)3500
d)2500
e)None of these

Directions(6-10): Study the following graph carefully and answer the questions given below.
Three different products (in thousands) produced by a company in five different years

6.What was the total number of all the products produced by the company in the year 2006 and 2008 together?
a)10750
b)107.5 lacs
c)105700
d)10570
e)None of these

7.What was the average number of Pen-drives produced by the company over all the years together?
a)1700
b)1.7 lacs
c)17000
d)85000
e)None of these

8.What is the difference between the total number of Pen-drives and CDs produced by the company together in the year 2008 and the number of Key boards produced by the company in the year 2006?
a)40000
b)4000
c)35000
d)3500
e)None of these

9.What was the respective ratio between the number of Key boards produced by the company in the year 2006, 2007 and 2009?
a)1:2:3
b)1:2:2
c)2:1:3
d)1:2:1
e)None of these

10.What was the respective ratio between the number of CDs produced by the company in the year 2009 and the number of Key boards produced by the company in the year 2005?
a)9:10
b)11:10
c)10:9
d)10:11
e)None of these

1.c)
2.a)
3.d)
4.b)
5.c)
6.a)
7.c)
8.a)
9.d)
10.a)

Solution
1.Average number of students in 2006
= [(2.5 + 3 + 3.5)/3] × 100 = 3000

2.Required% = [(3 + 2.5)/(3 + 3.5)] × 100 = 85% (approx)

3.The total number of students was equal in 2005, 2006 and 2007.

4.Required average number of students in School A
= [(1 + 2 + 1.5 + 2.5 + 3 + 2.5)/6] × 1000 = 2090 (approx)

5.Required difference
= (2.5 + 3 + 3.5 - 1 - 2 - 2.5) thousand
= 3500

= (10 + 7.5 + 15 + 25 + 30 + 20) thousand
= 10750

7.Average number of produced Pen-drives
= [(15 + 7.5 + 15 + 30 + 17.5)/5] thousand
= 17000

8.Required difference = (30 + 25 - 15) thousand = 40000

9.Required ratio = 15:30:15 = 1:2:1

10.Required ratio = 22.5 : 25 = 9 : 10 