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Question 41

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

162 + (5/8) of 344 + ? = 500

  1. AOption (a)

    19

  2. BOption (b)

    23

  3. COption (c)

    29

  4. DOption (d)

    31

  5. EOption (e)

    17

View answer & explanation

Correct answer

Answer: (c)C.

29

Why this answer is correct

Given:

162 + (5/8) of 344 + ? = 500

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

162 + (5/8) of 344 + ? = 500

⇒ 256 + (5/8) of 344 + ? = 500

⇒ 256 + 215 + ? = 500

⇒ ? = 500 - 471

⇒ ? = 29

∴ 29 should come in place of the question mark (?).

Question 42

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

What should come in place of the question mark '?' in the following question?

10% of 450 - (8 × 5) = ? × 5

  1. AOption (a)

    8.2

  2. BOption (b)

    2

  3. COption (c)

    1

  4. DOption (d)

    5

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

1

Why this answer is correct

Given:

10% of 450 - (8 × 5) = ? × 5

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

10% of 450 - (8 × 5) = ? × 5

⇒ 45 - 40 = ? × 5

⇒ 5 = ? × 5

⇒ ? = 1

∴ The value of '?' is 1.

Question 43

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

78 ÷ 6 × 5 + √625 = ? × 9

  1. AOption (a)

    9

  2. BOption (b)

    8

  3. COption (c)

    10

  4. DOption (d)

    7

  5. EOption (e)

    6

View answer & explanation

Correct answer

Answer: (c)C.

10

Why this answer is correct

Given:

78 ÷ 6 × 5 + √625 = ? × 9

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

78 ÷ 6 × 5 + √625 = ? × 9

⇒ 13 × 5 + 25 = ? × 9

⇒ 65 + 25 = ? × 9

⇒ ? × 9 = 90

⇒ ? = 10

∴ 10 should come in place of the question mark (?).

Question 44

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

122 × 5 - √400 + ? × 5 = 850

  1. AOption (a)

    20

  2. BOption (b)

    25

  3. COption (c)

    30

  4. DOption (d)

    35

  5. EOption (e)

    40

View answer & explanation

Correct answer

Answer: (c)C.

30

Why this answer is correct

Given:

122 × 5 - √400 + ? × 5 = 850

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

122 × 5 - √400 + ? × 5 = 850

⇒ 144 × 5 - 20 + ? × 5 = 850

⇒ 720 - 20 + ? × 5 = 850

⇒ ? × 5 = 150

⇒ ? = 30

∴ 30 should come in place of the question mark (?).

Question 45

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

20 - 102 = 41 - ?2

  1. AOption (a)

    12

  2. BOption (b)

    10

  3. COption (c)

    7

  4. DOption (d)

    11

  5. EOption (e)

    9

View answer & explanation

Correct answer

Answer: (d)D.

11

Why this answer is correct

Given:

20 - 102 = 41 - ?2 

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

20 - 102 = 41 - ?2 

⇒ 20 - 100 = 41 - ?2

⇒ -80 = 41 - ?2

⇒ ?2 = 121

⇒ ? = 11

∴ The value of ? is 11.

Question 46

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

5656 ÷ 28 × 11 - 333 = ?

  1. AOption (a)

    1789

  2. BOption (b)

    1989

  3. COption (c)

    1889

  4. DOption (d)

    2089

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

1889

Why this answer is correct

Given:

5656 ÷ 28 × 11 - 333 = ?

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

5656 ÷ 28 × 11 - 333 = ?

⇒ 202 × 11 - 333 = ?

⇒ 2222 - 333 = ?

⇒ ? = 1889

∴ The value of ? is 1889.

Question 47

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

90 × 20% of 105 ÷ 3 = ?

  1. AOption (a)

    630

  2. BOption (b)

    600

  3. COption (c)

    615

  4. DOption (d)

    610

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (a)A.

630

Why this answer is correct

Given:

90 × 20% of 105 ÷ 3 = ?

Concept Used:

Follow the BODMAS rule according to the table given below:

Calculation:

90 × 20% of 105 ÷ 3 = ?

⇒ 90 × (1/5) × 105/3 = ?

⇒ 18 × 35 = ?

⇒ ? = 630

∴ The value of ‘?’ Is 630.

Hint

20% = 1/5

Question 48

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

440 + 1825 ÷ 25 + 102 = 215 + ?

  1. AOption (a)

    375

  2. BOption (b)

    400

  3. COption (c)

    425

  4. DOption (d)

    450

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

400

Why this answer is correct

Given:

440 + 1825 ÷ 25 + 102 = 215 + ?

Concept Used:

Follow the BODMAS rule according to the table given below:

Calculation:

440 + 1825 ÷ 25 + 102 = 215 + ?

⇒ 440 + (1825/25) + 102 = 215 + ?

⇒ 440 + 73 + 102 - 215 = ?

⇒ ? = 400

∴ The value of ‘?’ Is 400.

Question 49

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

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

(4/9) of (729/2) + 400 = ?

  1. AOption (a)

    462

  2. BOption (b)

    662

  3. COption (c)

    562

  4. DOption (d)

    362

  5. EOption (e)

    262

View answer & explanation

Correct answer

Answer: (c)C.

562

Why this answer is correct

Given:

(4/9) of (729/2) + 400 = ?

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

(4/9) of (729/2) + 400 = ?

⇒ 81 × 2 + 400 = ?

⇒ 162 + 400 = ?

⇒ ? = 562

∴ The value of ? is 562.

Question 50

IBPS RRB Office Assistant (Clerk) 2025• Numerical Ability

What will come in the place of the question mark '?' in the following question?

 378 + ?1/2 = 25% of 2400 - 192

  1. AOption (a)

     784

  2. BOption (b)

     900

  3. COption (c)

     576

  4. DOption (d)

     400

  5. EOption (e)

     625

View answer & explanation

Correct answer

Answer: (b)B.

 900

Why this answer is correct

Given :

 378 + ?1/2 = 25% of 2400 - 192

 Calculation :

  378 + ?1/2  = 25% of 2400 - 192

 ⇒ 378 + ?1/2 = (2400 × 1 / 4 ) - 192

 ⇒ 378 + ?1/2 = 600 - 192

 ⇒ ?1/2  = 408 - 378

 ⇒ ?1/2  = 30

 ⇒ (?)2×1/2 = 302

 ⇒ ? = 900

 Hence,900 will come in the place of '?'.

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