type 3 addition subtraction product on ratio & proportion Section-Wise Topic Notes With Detailed Explanation And Example Questions
MOST IMPORTANT quantitative aptitude - 9 EXERCISES
-
199+ Ratio Proportion Basic Concepts MCQ Questions Answers »
-
Top 199+ Ratio Proportion Age Based MCQ Questions Answers »
-
159+ Ratios Proportions Addition Subtraction product MCQ »
-
199+ Ratio Proportion Income, Expenditure Problems MCQS »
-
199+ Partnership Aptitude (Ratio) MCQ Questions Answers »
-
259+ Ratio and Proportion (fractions) Aptitude MCQ Quiz »
-
199+ Ratio and Proportion Aptitude Questions Answers MCQ »
-
299+ Alligation and Mixture Problems Aptitude MCQ Quiz »
-
249+ Ratio and Proportion Coins Based Questions Answers »
The following question based on ratio & proportion topic of quantitative aptitude
(a) 250
(b) 286
(c) 280
(d) 273
The correct answers to the above question in:
Answer: (d)
Let three numbers be a, b and c respectively.
According to the question,
a + b + c = 540
and b : c = 9 : 13
a : c = 2 : 7
$a/c × c/b = 2/7 × 13/9$
$a/b = 26/63$
b : c = 9 : 13 = 63 : 91
a : b : c = 26 : 63 : 91
Sum of the terms of ratio
= 26 + 63 + 91 = 180
c = $91/180 × 540$ = 273
Discuss Form
Read more addition subtraction product on ratio and proportion Based Quantitative Aptitude Questions and Answers
Question : 1
Two numbers whose sum is 84 can not be in the ratio
a) 1 : 3
b) 3 : 2
c) 13 : 8
d) 5 : 7
Answer »Answer: (b)
According to the question,
The number 84 must be a multiple of sum of the terms of ratio.
For ratio 3 : 2,
Sum of the terms of ratio
= 3 + 2 = 5
which is not a factor of 84.
Question : 2
The ratio of three positive numbers is 2 : 3 : 5 and the sum of their squares is 608. The three numbers are
a) 8, 12, 20
b) 4, 6, 10
c) 10, 15, 25
d) 2, 3, 5
Answer »Answer: (a)
Numbers = 2x, 3x and 5x,
According to question,
$(2x)^2 + (3x)^2 + (5x)^2$ = 608
$4x^2 + 9x^2 + 25x^2$ = 608
$38x^2$ = 608
$x^2 = 608/38$ = 16
$x = √16$ = 4
Numbers ⇒ 2x = 2 × 4 = 8
3x = 3 × 4 = 12
5x = 5 × 4 = 20
Question : 3
The product of two positive integers is 1575 and their ratio is 9 : 7. The smaller integer is
a) 45
b) 70
c) 35
d) 25
Answer »Answer: (c)
Let the integers be 9x and 7x respectively.
According to the question,
9x × 7x = 1575
$x^2 = 1575/63$
$x^2 = 25 ⇒ x = 5
[x being positive (+ve) integer]
Smaller integer
= 7x = 7 × 5 = 35
Question : 4
Two numbers are in the ratio 5 : 7. On diminishing each of them by 40, they become in the ratio 17 : 27. The difference of the numbers is :
a) 137
b) 50
c) 52
d) 18
Answer »Answer: (b)
Let the two numbers are x and y.
According to the question,
$x/y = 5/7$
7x = 5y
7x - 5y = 0 ...(I)
Again, ${x - 40}/{y - 40} =17/27$
27x - 1080 = 17y - 680
27x - 17y = 1080 - 680
27x - 17y = 400 ...(II)
From (I) × 17 - (II) × 5, we have
119x | - | 85y | =0 |
135x | - | 85y | =2000 |
- | + | - |
-16x = -2000
x = 125
Putting the value of x in equation (I)
7 × 125 = 5y
$y = {7 × 125}/5$ = 175
Difference of the numbers
= 175 - 125 = 50
Using Rule 35Two numbers are in the ratio a:b and if x is subtracted from each number the ratio becomes c:d. The two numbers will be= ${xa(d-c)}/{ad-bc}$ and ${xb(d-c)}/{ad-bc}$
Here, a = 5, b = 7, x = 40
c = 17, d = 27
The two numbers are
= ${xa(d-c)}/{ad-bc}$
= ${40 ×5(27 - 17)}/{5 × 27 - 7 × 17}$
= ${200 × 10}/{135 - 119}$
= $2000/16 = 500/4$
1st Number = 125
And = ${xb(d-c)}/{ad-bc}$
= ${40 ×7(27 - 17)}/{5 × 27 - 7 × 17}$
= ${280 × 10}/{135 - 119}$
= $2800/16 = 700/4$
2nd Number = 175
Their difference= 175 - 125 = 50
Question : 5
When a particular number is subtracted from each of 7, 9, 11 and 15, the resulting numbers are in proportion. The number to be subtracted is :
a) 3
b) 5
c) 2
d) 1
Answer »Answer: (a)
Let the number to be subtracted be x.
According to the question,
${7 - x}/{9 - x} ={11 - x}/{15 - x}$
Now, check through options
Clearly, putting x = 3,
Each ratio = $2/3$.
Note : Solve such questions orally by mental exercise.
Using Rule 32Let 'x' be a number which is subtracted from a, b, c and d to make them proportional, thenx = ${ad - bc}/{(a+d) - (b+c)}$Let 'x' be a number which is added to a, b, c and d to make them proportional, thenx = ${bc - ad}/{(a+d) - (b+c)}$Here, a, b, c and d should always be in ascending order.
The number will be x
= ${ad - bc}/{(a+d) - (b+c)}$
= ${7 × 15 - 9 × 11}/{(7 + 15) - (9 + 11)}$
= ${105 - 99}/{22 - 20} = 6/2$ = 3
Question : 6
Of the three numbers, the ratio of the first and the second is 8 : 9 and that of the second and third is 3 : 4. If the product of the first and third number is 2400, then the second number is :
a) 30
b) 55
c) 40
d) 45
Answer »Answer: (d)
Let the numbers be a, b and c.
Now, a : b = 8 : 9
b : c = 3 : 4
a : b : c
= 8 × 3 : 9 × 3 : 9 × 4
= 24 : 27 : 36 = 8 : 9 : 12
$a/8 = b/9 = c/12= k$
a = 8k, b = 9k, c = 12k
According to the question,
8k × 12k = 2400
$k^2 = 2400/{8 × 12}$ = 25
k = 5
Second number
= 9k = 9 × 5 = 45
GET ratio & proportion PRACTICE TEST EXERCISES
type 1 basic concepts of ratio & proportion
type 2 age based ratio & proportion problems
type 3 addition subtraction product on ratio & proportion
type 4 income & expenditure based ratio & proportion problems
type 5 shares & partnership based ratio & proportion problems
type 6 fractions based ratio & proportion problems
type 7 finding sum difference product based ratio & proportion problems
type 8 alligation & mixtures based ratio & proportion problems
type 9 coins & rupees based ratio & proportion problems
ratio & proportion Shortcuts and Techniques with Examples
Verbal Reasoning
Question & Answer Quiz
Non Verbal Reasoning
Question & Answer Quiz
Quantitative Aptitude
Question & Answer Quiz
Computer MCQ
Question & Answer Quiz
General English
Question & Answer Quiz
History GK
Question & Answer Quiz
Polity GK
Question & Answer Quiz
Geography GK
Question & Answer Quiz
Economy GK
Question & Answer Quiz
General Awareness GK
Question & Answer Quiz
Recently Added Subject & Categories For All Competitive Exams
Most Important Antonyms Vocabulary - IBPS Clerk Prelims 2024
Latest Antonyms multiple choice questions and answers with free PDFfor IBPS Clerk Prelims 2024. English Vocabulary practice exercise for all bank exam
Continue Reading »
Syllogism Practice Questions Answers PDF - IBPS Clerk 2024
Practice Verbal Reasoning Syllogism multiple choice questions and answers with Fully solved explanation, PDF for the IBPS Clerk Prelims 2024 Bank Exam
Continue Reading »
IBPS Clerk Prelims 2024 Synonyms Questions Solved Answers
Most important IBPS Clerk Prelims 2024 Synonyms and Antonyms multiple choice questions and answers with detailed solutions, English vocabulary PDF Download
Continue Reading »
New Cloze Test Questions and Answers PDF - IBPS Clerk 2024
The most important Cloze Test questions with detailed answers for upcoming IBPS Clerk prelims 2024. Latest English verbal ability practice MCQs, PDF
Continue Reading »