Quantitative Aptitude

General Questions

Quantitative Aptitude Exercise Mode

General Questions

Practice and master this topic with our carefully crafted questions.

10 Questions
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Question 1
A number is doubled and 9 is added. If the resultant is trebled. it becomes 75. What is that number?

A
3.5
B
6
C
8
D
None of these
Correct Answer: Option C

Let the number be x Then,

3(2x + 9) =75

<=> 2x + 9 = 25

<=> 2x = 16

<=> x = 8

Question 2
If one-third of one-fourth of a number is 15, then three-tenth of that number is :

A
35
B
36
C
45
D
54
Correct Answer: Option D

Let the number be x.

Then, 1 of 1 of x = 15   
3 4

  x = 15 x 12 = 180.

So, required number = 		3 x 180 = 54.
10

Question 3
Find the number which when multiplied by 15 is increased by 196.

A
14
B
20
C
26
D
28
Correct Answer: Option A

Let the number be x Then,

15x - x = 196

<=> 14x = 196

<=> x = 14.

Question 4
If 50 is subtracted from two-third of a number, the result is equal to sum of 40 and one-fourth of that number. What is the number ?

A
174
B
216
C
246
D
336
Correct Answer: Option B
Let the number be X.

Then, 2X  - 50 = 1X  + 40
           3               4

<=> 2X  - 1X = 90
         3      4
<=> 5X  = 90
       12
<=> X =  90 x 12 = 216
                   5
Question 5
Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is :

A
9
B
11
C
13
D
15
Correct Answer: Option D

Let the three integers be x, x + 2 and x + 4.

Then, 3x = 2(x + 4) + 3      x = 11.

Third integer = x + 4 = 15.

Question 6
The product of two numbers is 192 and the sum of these two numbers is 28. What is the smaller of these two numbers ?

A
12
B
14
C
16
D
18
E
None of these
Correct Answer: Option A

Let the number be x and (28 - x). Then,
x(28 - x) = 192
<=> X2 – 28x + 192 = 0
<=> (x - 16) (x - 12) = 0
<=> x = 16 or x = 12.
So, the numbers are 16 and 12.

Question 7
Find a positive number which when increased by 17 is equal to 60 times the reciprocal of the number.

A
3
B
10
C
17
D
20
Correct Answer: Option A

Let the number be x.

Then, x + 17 = 60 / x

<=> X2 + 17x - 60 = 0

<=> (x + 20) (x - 3) = 0

<=> x = 3

Question 8
A number consists of two digits. If the digits interchange places and the new number is added to the original number , then the resulting number will be divisible by :

A
3
B
5
C
9
D
11
Correct Answer: Option D

Let the ten's digit be x and unit's digit be y.

Then, number = 10x + y.

Number obtained by interchanging the digits = 10y + x.

(10x + y) + (10y + x) = 11(x + y), which is divisible by 11.

Question 9
The sum of four consecutive odd integers is 1284. The greatest of them is :

A
320
B
322
C
324
D
326
Correct Answer: Option C

Let the four integers be x, x + 2, x + 4 and x + 6.
Then, x + (x + 2) + (x + 4) + (x + 6) = 1284
<=> 4x = 1272
<=> x = 318
Greatest integer = x + 6 = 324

Question 10
The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number ?

A
3
B
4
C
9
D
Cannot be determined
E
None of these
Correct Answer: Option B

Let the ten's digit be x and unit's digit be y.

Then, (10x + y) - (10y + x) = 36

9(x - y) = 36

x - y = 4.

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