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IBPS RRB Office Assistant (Clerk) · Topic Collection

Quantitative Aptitude PYQs

Arithmetic, number systems, percentages, ratios, profit and loss, time and work, algebra, geometry, mensuration, and trigonometry.

1935 Total Questions49 Official PapersYears: 2018–2025Search in Quantitative Aptitude
Showing questions 201–220 of 1935Page 11 of 97
RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 201

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

Sandeep lent Rs. 25000 to Arvind and if Arvind returned it to him after 3 years at simple interest rate of 12%, find the amount of interest.

  1. AOption (a)

    Rs. 10,000

  2. BOption (b)

    Rs. 9000

  3. COption (c)

    Rs. 8000

  4. DOption (d)

    Rs. 5000

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

Rs. 9000

Why this answer is correct

Given:

Arvind borrow an amount = Rs. 25000 

Time period = 3 years

Rate of interest = 12%

Formula Used:

(P × R × T)/100 = S.I

Where P = Principle, R = Rate of interest, T = Time, S.I = Simple interest.

Calculation:

S.I = (P × R × T)/100

⇒ (25000 × 12 × 3)/100

⇒ 250 × 36

⇒ 9000

∴ The amount of interest is Rs. 9000.

Additional Information

 Borrowed money is considered as the Principle.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 202

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

Boat can do a round trip of 88 km (44 km to and fro) in 12 hours. If ratio of boat speed to stream speed is 3 ∶ 1, Find stream speed (in km/hr)

  1. AOption (a)

    2.25

  2. BOption (b)

    2.5

  3. COption (c)

    2.75

  4. DOption (d)

    3.25

  5. EOption (e)

    3.5

View answer & explanation

Correct answer

Answer: (c)C.

2.75

Why this answer is correct

Given:

Time for 44 km round trip = 12 hours.

Ratio of boat speed to stream speed = 3 : 1

Formula:

Speed = Distance/Time

Downstream speed = u + v

Upstream speed = u – v

u and v are speed of boat and stream respectively

Calculation:

Let speeds of boat and stream be 3x and x respectively.

44/(3x – x) + 44/(x + 3x) = 12

44/2x + 44/4x = 12

132/4x = 12

x = 2.75 km/hr

∴ The speed of stream is 2.75 km/h.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 203

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of question mark (?) in the given expression?

122 + 132 – 15 × 45 ÷ 5 = 89 × ?

  1. AOption (a)

    3

  2. BOption (b)

    2

  3. COption (c)

    4

  4. DOption (d)

    1

  5. EOption (e)

    7

View answer & explanation

Correct answer

Answer: (b)B.

2

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below

Calculations:

122 + 132 – 15 × 45 ÷ 5 = 89 × ?

⇒ 144 + 169 – 135 = 89 × ?

⇒ 178 = 89 × ?

⇒ ? = 178/89

⇒ ? = 2 

∴ The value of ? is 2

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 204

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of question mark (?) in the given expression?

30% of 150 + 22 = ?2 – 50% of 30

  1. AOption (a)

    8

  2. BOption (b)

    6

  3. COption (c)

    7

  4. DOption (d)

    9

  5. EOption (e)

    10

View answer & explanation

Correct answer

Answer: (a)A.

8

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below

Calculations:

30% of 150 + 22 = ?2 – 50% of 30

⇒ (30/100) × 150 + 4 = ?2 – (50/100) × 30 

⇒ 45 + 4 = ?2 – 15 

⇒ ?2 = 64 

⇒ ? = √64 = 8 

∴ The value of ? is 8

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 205

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of ‘?’ in the following question?

90 + 9 × 42 ÷ (119 ÷ 17) = ?

  1. AOption (a)

    154

  2. BOption (b)

    44

  3. COption (c)

    144

  4. DOption (d)

    164

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

144

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculations:

90 + 9 × 42 ÷ (119 ÷ 17) = ?

⇒ 90 + 9 × 42 ÷ 7 = ?

⇒ 90 + 9 × 6 = ?

⇒ 90 + 54 = ?

⇒ 144 = ?

∴ The value of ? is 144

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 206

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of the question mark ‘?’ in the following question?

∛1728 ÷ √144 + ?2 = 257

  1. AOption (a)

    256

  2. BOption (b)

    16

  3. COption (c)

    26

  4. DOption (d)

    √258

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

16

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculations:

∛1728 ÷ √144 + ?2 = 257

⇒ 12 ÷ 12 + ?2 = 257

⇒ 1 + ?2= 257

⇒ ?2 = 257 – 1

⇒ ?2 = 256

⇒ ? = √256

⇒ ? = 16

∴ The value of x is 16

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 207

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of ‘?’ in the following question?

 96 × 108 ÷ 24 + 169 ÷ 13 = ?

  1. AOption (a)

    465

  2. BOption (b)

    419

  3. COption (c)

    445

  4. DOption (d)

    545

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

445

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculations:

96 × 108 ÷ 24 + 169 ÷ 13 = ?

⇒ 432 + 13 = ?

⇒ ? = 445

∴ The value of ? is 445

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 208

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What should come in place of question mark (?) in the following question?

[33 × 24] ÷ 16 × 49 – 594 = ?3

  1. AOption (a)

    7

  2. BOption (b)

    11

  3. COption (c)

    8

  4. DOption (d)

    9

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (d)D.

9

Why this answer is correct

Concept used:

Calculation:

Considering the following given question

[33 × 24] ÷ 16 × 49 – 594 = ?3

⇒ [27 × 16] ÷ 16 × 49 – 594 = ?3

⇒ [432] ÷ 16 × 49 – 594 = ?3

⇒ 432 ÷ 16 × 49 – 594 = ?3

⇒ 27 × 49 – 594 = ?3

⇒ 1323 – 594 = ?3

⇒ ?3 = 729

⇒ ? = 9

∴ ? = 9

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 209

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of the question mark ‘?’ in the following question?

(6.5% of 375) – (0.85% of 230) = ?

  1. AOption (a)

    23.42

  2. BOption (b)

    24.24

  3. COption (c)

    21.64

  4. DOption (d)

    25.76

  5. EOption (e)

     22.42

View answer & explanation

Correct answer

Answer: (e)E.

 22.42

Why this answer is correct

Concept used: 

Follow BODMAS rule to solve this question, as per the order given below

Calculation:

(6.5% of 375) – (0.85% of 230) = ?

⇒24.375 − 1.955 = ?

⇒ 22.42 = ?

∴ The value of ? is 22.42

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 210

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What should come in place of question mark (?) in the following questions?

16 + √361 – 19 + √625 + 76 = ?

  1. AOption (a)

    189

  2. BOption (b)

    117

  3. COption (c)

    122

  4. DOption (d)

    154

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

117

Why this answer is correct

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

16 + √361 – 19 + √625 + 76 = ?

⇒ 16 + 19 – 19 + 25 + 76 = ?

⇒ 16 + 25 + 76 = ?

⇒ 117 = ?

∴ Result will be 117.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 211

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of the question mark ‘?’ in the following question?

24 + 112 – 64 ÷ 8 + 12 ÷ 3 = ?

  1. AOption (a)

    122

  2. BOption (b)

    132

  3. COption (c)

    133

  4. DOption (d)

    162

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

132

Why this answer is correct

Concept Used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

24 + 112 – 64 ÷ 8 + 12 ÷ 3 = ?

⇒ 24 + 112 – 8 + 4 = ?

⇒ 136 – 8 + 4 = ?

⇒ 140 – 8 = ?

⇒ ? = 132

∴ Result will be 132.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 212

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What should come in place of question mark (?) in the following questions?

26 + 22 – 24 + 112 ÷ 16 × 4 = ?

  1. AOption (a)

    51

  2. BOption (b)

    54

  3. COption (c)

    52

  4. DOption (d)

    53

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

52

Why this answer is correct

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

26 + 22 – 24 + 112 ÷ 16 × 4 = ? 

⇒ 26 + 22 – 24 + 7 × 4 = ?

⇒ 26 + 22 – 24 + 28 = ?

⇒ 76 – 24 = ?

⇒ 52 = ?

∴ Result will be 52.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 213

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What should come in place of question mark (?) in the following questions?

1728 - √144 × 20 ÷ 2.5 + 89 – 12 = ?

  1. AOption (a)

    1509

  2. BOption (b)

    1609

  3. COption (c)

    1709

  4. DOption (d)

    1109

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

1709

Why this answer is correct

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

1728 - √144 × 20 ÷ 2.5 + 89 – 12 = ?

⇒ 1728 – 12 × 8 + 89 – 12 = ?

⇒ 1728 – 96 + 89 – 12 = ?

⇒ 1817 – 108 = ?

⇒ 1709 = ?

∴ Result will be 1709.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 214

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What should come in place of question mark (?) in the following questions?

[(22)2 × 2 ÷ 22] ÷ 44 × 5 – 1 = ? – 124

  1. AOption (a)

    628

  2. BOption (b)

    738

  3. COption (c)

    724

  4. DOption (d)

    728

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (e)E.

None of these

Why this answer is correct

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

[(22)2 × 2 ÷ 22] ÷ 44 × 5 – 1 = ? – 124

⇒ [484 ÷ 11] ÷ 44 × 5 – 1 = ? – 124

⇒ 44 ÷ 44 × 5 – 1 = ? – 124

⇒ 1 × 5 – 1 = ? – 124

⇒ 5 – 1 = ? – 124

⇒ 4 = ? – 124

⇒ ? = 128

∴ ? = 128

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 215

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What should come in place of question mark (?) in the following questions?

2000 % of 15 ÷ 5 × 12 = ?

  1. AOption (a)

    730

  2. BOption (b)

    620

  3. COption (c)

    710

  4. DOption (d)

    720

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (d)D.

720

Why this answer is correct

Concept Used:       

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

⇒ 2000 % of 15 ÷ 5 × 12 = ?

⇒ 300 ÷ 5 × 12 = ?

⇒ 60 × 12 = ?

⇒ ? = 720

∴ ? = 720

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 216

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of the question mark ‘?’ in the following question?

81 – 9 × √49 + 21 + √225 × 2 = ?

  1. AOption (a)

    99

  2. BOption (b)

    79

  3. COption (c)

    89

  4. DOption (d)

    69

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (d)D.

69

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

81 – 9 × √49 + 21 + √225 × 2 = ?

⇒ 81 – 9 × 7 + 21 + 15 × 2 = ?

⇒ 81 – 63 + 21 + 30 = ?

⇒ 81 – 63 + 51 = ?

⇒ 132 – 63 = ?

⇒ 69 = ?

∴ ? = 69.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 217

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

What will come in the place of the question mark ‘?’ in the following question?

81 ÷ 9 × 3 + 21 – 63 + 16 × 6 = ?

  1. AOption (a)

    31

  2. BOption (b)

    81

  3. COption (c)

    41

  4. DOption (d)

    51

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

81

Why this answer is correct

Concept used:

Follow BODMAS rule to solve this question, as per the order given below,

Calculation:

81 ÷ 9 × 3 + 21 – 63 + 16 × 6 = ?

⇒ 9 × 3 + 21 – 63 + 16 × 6 = ?

⇒ 27 + 21 – 63 + 96 = ?

⇒ 144 – 63 = ?

⇒ 81 = ?

∴ The value of ? is 81

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 218

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

A shopkeeper increased the cost price by 30% and gave 30% discount and suffered a loss of Rs. 810. What was the cost price of product ?

  1. AOption (a)

    990

  2. BOption (b)

    1000

  3. COption (c)

    720

  4. DOption (d)

    9000

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (d)D.

9000

Why this answer is correct

Given:

M.R.P = 30% more than CP

Discount = 30%

Loss = Rs. 810

Formula Used:

Cost price × (100 + Profit %)/100 = Selling price

Also, Cost price × (100 - Loss %)/100 = Selling price

{(M.R.P – S.P)/M.R.P} × 100 = Discount %

Calculation:

Let the C.P of the product be 100x.

M.R.P = 100x × (130/100)

⇒ 130x

Discount = 30%

⇒ 130x × (30/100) = 39x

S.P = 130x – 39x

⇒ 91x

Loss = C.P – S.P

⇒ 100x – 91x

⇒ 9x

Value of 90x = 810

⇒ x = 810/9

⇒ x = 90

C.P = 100x

⇒ 100 × 90

⇒ 9000

∴ The cost price of the product was Rs. 9000.

Alternate Method

Let C.P be 100x.

C.P : M.R.P : Dis. : S.P : Loss

100x : 130x : 39x : 91x : 9x

Loss = 810

⇒ 9x = 810

⇒ x = 90

C.P = 100x

⇒ 100 × 90

⇒ 9000

∴ The cost price of the product is Rs. 9000.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 219

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

The salaries of three friends A, B and C are in the ratio 2 ∶ 5 ∶ 7. If the increment in their salary is 5%, 20% and 30% respectively, what is the new ratio of their salaries?

  1. AOption (a)

    40 ∶ 63 ∶ 110

  2. BOption (b)

    35 ∶ 43 ∶ 110

  3. COption (c)

    21 ∶ 60 ∶ 91   

  4. DOption (d)

    29 ∶ 63 ∶ 91   

  5. EOption (e)

    35 ∶ 28 ∶ 97

View answer & explanation

Correct answer

Answer: (c)C.

21 ∶ 60 ∶ 91   

Why this answer is correct

Given: 

The ratio of Salaries of A, B and C = 2 ∶ 5 ∶ 7

Increment in salary of A = 5%

Increment in salary of B = 20%

Increment in salary of C = 30%

Formula used:

Salary after increment = old salary × [(100 + increased percent)/100]

Calculation:

Let the salary of A, B and C is 2x, 5x and 7x respectively.

New salary of A after increment = 2x × (105/100) = 210x/100

New salary of B after increment = 5x × (120/100) = 600x/100

New salary of C after increment = 7x × (130/100) = 910x/100

Now, Ratio of the salaries of A, B and C = 210x ∶ 600x ∶ 910x

⇒ 21 ∶ 60 ∶ 91

∴ The new ratio of salaries of A, B and C is 21 ∶ 60 ∶ 91 respectively.

RRB Clerk Prelims Memory Based Paper (Held On: 7 Dec 2025 Shift 1) (Previous Year Paper)·Numerical Ability
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Question 220

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability• Numerical Ability

The milk and water in a mixture are in the ratio of 7 : 5. When 15 litres of milk and 25 litres of water are added in the mixture, The mixture becomes 1 :

  1. Find the quantity of Milk in the new mixture.
  1. AOption (a)

    40 litres

  2. BOption (b)

    35 litres

  3. COption (c)

    45 litres

  4. DOption (d)

    50 litres

  5. EOption (e)

    30 litres

View answer & explanation

Correct answer

Answer: (d)D.

50 litres

Why this answer is correct

Given:

Ratio of milk and water in the mixture = 7 : 5

Amount of milk added = 15 litres

Amount of water added = 25 litres

Ratio of final mixture = 1 : 1

Formula used:

∴ (Ratio of milk in the mixture + new quantity of milk added) : (Ratio of water in the mixture + new quantity of water added) = New ratio of mixture

Calculation:

Let the amount of milk and water be 7x and 5x respectively

New amount of milk added = 15 litres

Final amount of milk = (7x + 15) litres

New amount of water added = 25 litres

Final amount of water added = (5x + 25) litres

Final ratio = 1 : 1

Now, as we know that

(Ratio of milk in the mixture + new quantity of milk added) : (Ratio of water in the mixture + new quantity of water added) = New ratio of mixture

\( \Rightarrow \frac{{7x + 15}}{{5x + 25}} = \frac{1}{1}\)

⇒ 7x + 15 = 5x + 25

⇒ 2x = 10

⇒ x = 5 litres

Now, quantity of milk in the new mixture = (7x + 15) litres

⇒ Quantity of milk in the new mixture = (7 × 5 + 15) litres

⇒ 50 litres

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How should I prepare for Quantitative Aptitude in IBPS RRB Office Assistant (Clerk)?

Solving previous year questions by topic helps identify recurring concepts, question patterns, and frequently asked sub-topics. Attempt each question, review the step-by-step explanation, and note down key formulas or facts for quick revision before the exam.