IBPS RRB Clerk 2018 Prelims Exam: Quants Test Day 1
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Question 1 of 10
1. Question
1 pointsCategory: Quantitative Aptitude2, 4, 5, ?, 83, 348
Correct
Answer – 2.26
Explanation :
2 + 1² + 1 = 4
4 + 2² – 3 = 5
5 + 4² + 5 = 26
26 + 8² – 7 = 83
83 + 16² + 9 = 348Incorrect
Answer – 2.26
Explanation :
2 + 1² + 1 = 4
4 + 2² – 3 = 5
5 + 4² + 5 = 26
26 + 8² – 7 = 83
83 + 16² + 9 = 348 
Question 2 of 10
2. Question
1 pointsCategory: Quantitative Aptitude8, 6, 13, 20, 58, ?
Correct
Answer – 3.164
Explanation :
8 * 1 – 2 = 6
6 * 1.5 + 4 = 13
13 * 2 – 6 = 20
20 * 2.5 + 8 = 58
58 * 3 – 10 = 164Incorrect
Answer – 3.164
Explanation :
8 * 1 – 2 = 6
6 * 1.5 + 4 = 13
13 * 2 – 6 = 20
20 * 2.5 + 8 = 58
58 * 3 – 10 = 164 
Question 3 of 10
3. Question
1 pointsCategory: Quantitative Aptitude? / 576 = 1089 / ?
Correct
Answer – 5. 792
Explanation :
x² = 576 * 1089 => x = 24 * 33 = 792Incorrect
Answer – 5. 792
Explanation :
x² = 576 * 1089 => x = 24 * 33 = 792 
Question 4 of 10
4. Question
1 pointsCategory: Quantitative Aptitude√((468)÷39 + 15 + 11 * (?)) = 7
Correct
Answer – 3. 2
Explanation :
√((468)÷39 + 15 + 11 * (?)) = 7
12 + 15 + 11x = 49
11x + 27 = 49
x = 2Incorrect
Answer – 3. 2
Explanation :
√((468)÷39 + 15 + 11 * (?)) = 7
12 + 15 + 11x = 49
11x + 27 = 49
x = 2 
Question 5 of 10
5. Question
1 pointsCategory: Quantitative Aptitude7/√x + 2/√x = √x
y(2x + 3) = 90Correct
Answer – 1. X > Y
Explanation:
7/√x + 2/√x = √x
1/√x (7 + 2) = √x => x = 9
y(2x + 3) = 90
y = 7.5, 6Incorrect
Answer – 1. X > Y
Explanation:
7/√x + 2/√x = √x
1/√x (7 + 2) = √x => x = 9
y(2x + 3) = 90
y = 7.5, 6 
Question 6 of 10
6. Question
1 pointsCategory: Quantitative Aptitudex² – 21x + 196 = 0
y² + 4y – 221 = 0Correct
Answer – 5. X = Y or relation cannot be established
Explanation:
x² – 21x + 196 = 0
x = 28, – 7
(y – 13) (y + 17) = 0
y = 13, – 17Incorrect
Answer – 5. X = Y or relation cannot be established
Explanation:
x² – 21x + 196 = 0
x = 28, – 7
(y – 13) (y + 17) = 0
y = 13, – 17 
Question 7 of 10
7. Question
1 pointsCategory: Quantitative AptitudeSamir age is 125% of what it was ten years ago, but 250/3% of what it will be after ten years. What is the age of Samir after 5 years?
Correct
Answer – 2. 55 years
Explanation :
Samir’s age before 10 years = x
125x/100 = x + 10
125x = 100x + 1000 => x = 40
Present age = x + 10 = 50; After 5 years = 55Incorrect
Answer – 2. 55 years
Explanation :
Samir’s age before 10 years = x
125x/100 = x + 10
125x = 100x + 1000 => x = 40
Present age = x + 10 = 50; After 5 years = 55 
Question 8 of 10
8. Question
1 pointsCategory: Quantitative AptitudeThe length of a rectangle wall is 5/2 times of its height. If the area of the wall is 1000m². What is the sum of the length and height of the wall?
Correct
Answer – 4. 70
Explanation :
length = 2x
height = 5x
Area of the wall = 5x * 2x = 10x² = 1000
x = 10; Sum of the length and height of the wall = 70Incorrect
Answer – 4. 70
Explanation :
length = 2x
height = 5x
Area of the wall = 5x * 2x = 10x² = 1000
x = 10; Sum of the length and height of the wall = 70 
Question 9 of 10
9. Question
1 pointsCategory: Quantitative AptitudeSharmi took a loan at SI of 6 p.c.p.a in the first year & it increased by 1.5 p.c.p.a every year. If she pays Rs 8190 as interest at the end of 3 years, what was her loan amount?
Correct
Answer – 5.36400
Explanation:
Let loan amount be Rs X
8190 = {(X*6)/100}+ {X*(6+1.5)}/100 + {X*(6+1.5+1.5)}/100
X=36400Incorrect
Answer – 5.36400
Explanation:
Let loan amount be Rs X
8190 = {(X*6)/100}+ {X*(6+1.5)}/100 + {X*(6+1.5+1.5)}/100
X=36400 
Question 10 of 10
10. Question
1 pointsCategory: Quantitative AptitudeRavi is as much younger than Sharma as he is older than Samir. If the sum of the ages of Sharma and Samir is 80 years, what is definitely the difference between Sharma and Ravi’s age?
Correct
Answer – 5. Can not be determined
Explanation :
Sharma’s age – Ravi’s age = Ravi’s age – Samir’s age
Samir’s age + Sharma’s age = 2 Ravi’s age
Sharma’s age + Samir’s age = 80
Ravi’s age = 40; We can not find the difference between Sharma and Ravi’s ageIncorrect
Answer – 5. Can not be determined
Explanation :
Sharma’s age – Ravi’s age = Ravi’s age – Samir’s age
Samir’s age + Sharma’s age = 2 Ravi’s age
Sharma’s age + Samir’s age = 80
Ravi’s age = 40; We can not find the difference between Sharma and Ravi’s age
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