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Question 231

RBI Assistant 2022• Numerical Ability

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

157% of 360 + 66% of 275 = 30% of ?

  1. AOption (a)

    2210

  2. BOption (b)

    2348

  3. COption (c)

    2489

  4. DOption (d)

    2620

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

2489

Why this answer is correct

As we know that BODMAS is used of simplifying a mathematical problem.

According to BODMAS first we have to solve ‘brackets’ followed by ‘of’ then ‘division’ then ‘multiplication’ and later ‘addition’, ‘subtraction’.

L.H.S

157/100 × 360 + 66/100 × 275

565.2 + 181.5 = 746.7

R.H.S

Let ‘x’ be the final answer

30/100 × x

Now, cross multiplying

x = (746.7 × 100)/30 = 2489.

Question 232

RBI Assistant 2022• Numerical Ability

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

423 + 142 × 1.56 = ? × 2

  1. AOption (a)

    495.5

  2. BOption (b)

    510.53

  3. COption (c)

    322.26

  4. DOption (d)

    534.16

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

322.26

Why this answer is correct

As we know that BODMAS is used of simplifying a mathematical problem.

According to BODMAS first we have to solve ‘brackets’ followed by ‘of’ then ‘division’ then ‘multiplication’ and later ‘addition’, ‘subtraction’.

∴ 142 × 1.56 = 221.52

 221.52 + 423 = 644.52

Now, cross multiplying 2 from R.H.S to L.H.S

644.52/2 = 322.26

Question 233

RBI Assistant 2022• Numerical Ability

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

28% of 450 + 45% of 280 = ?

  1. AOption (a)

    223

  2. BOption (b)

    250

  3. COption (c)

    232

  4. DOption (d)

    260

  5. EOption (e)

    252

View answer & explanation

Correct answer

Answer: (e)E.

252

Why this answer is correct

Concept used:

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

Calculation:

28% of 450 + 45% of 280 = ?

⇒ (28/100) × 450 + (45/100) × 280 = ?

⇒ 126 + 126 = ?

⇒ 252 = ?

∴ The value of ? is 252

Question 234

RBI Assistant 2022• Numerical Ability

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

123 × 64 ÷ 432 = ?

  1. AOption (a)

    5184

  2. BOption (b)

    5060

  3. COption (c)

    5148

  4. DOption (d)

    5011

  5. EOption (e)

    5814

View answer & explanation

Correct answer

Answer: (a)A.

5184

Why this answer is correct

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

Step-1: Parts of an equation enclosed in 'Brackets' must be solved first and in the bracket,

Step-2: Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3: Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4: Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

123 × 64 ÷ 432 = ?

123 × 3 = ?

? = 5184.

Question 235

RBI Assistant 2022• Numerical Ability

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

16 × 34 ÷ 17 – 5 + 6 = ?

  1. AOption (a)

    32

  2. BOption (b)

    33

  3. COption (c)

    35

  4. DOption (d)

    31

  5. EOption (e)

    30

View answer & explanation

Correct answer

Answer: (b)B.

33

Why this answer is correct

Follow BODMAS rule to solve this question, as per the order given below,Step - 1 - Parts of an equation enclosed in 'Brackets' must be solved first,Step - 2 - Any mathematical 'Of' or 'Exponent' must be solved next,Step - 3 - Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,Step - 4 - Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated

⇒ 16 × 2 – 5 + 6

⇒ 32 – 5 + 6

∴ 38 – 5 = 33

Question 236

RBI Assistant 2022• Numerical Ability

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

60% of (4/7) of 630 = ?

  1. AOption (a)

    216

  2. BOption (b)

    205

  3. COption (c)

    230

  4. DOption (d)

    190

  5. EOption (e)

    195

View answer & explanation

Correct answer

Answer: (a)A.

216

Why this answer is correct

Convert the data into mathematical form,

⇒ 630 × (4/7) × (60/100) = ?

⇒ 90 × 4 × 0.6 = ?                                      

⇒ ? = 216

Question 237

RBI Assistant 2022• Numerical Ability

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

(7/19) of 1064 = (?)2 × 2

  1. AOption (a)

    12

  2. BOption (b)

    14

  3. COption (c)

    √14

  4. DOption (d)

    196

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

14

Why this answer is correct

Given:

(7/19) of 1064 = (?)2 × 2

Concept Used:

Follow the BODMAS rule according to the table given below:

(7/19) of 1064 = (?)2 × 2

⇒ 392 = (?)2 × 2

⇒ 392 ÷ 2 = (?)2

⇒ 196 = (?)2

⇒ 14 = ?

∴ The value of ‘?’ Is 14.

Question 238

RBI Assistant 2022• Numerical Ability

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

 9672 ÷ 156 – 5 × 3.2 = √(?)

  1. AOption (a)

    2214

  2. BOption (b)

    2216

  3. COption (c)

    2116

  4. DOption (d)

    2126

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (c)C.

2116

Why this answer is correct

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

Step – 1 – Parts of an equation enclosed in the ‘BRACKETS’ must be solved first

Step – 2 – Any mathematical ‘OF’ or ‘EXPONENTS’ must be solved next

Step – 3 – Next the part of the equation that contains ‘DIVISION; and ‘MULTIPLICATION’ are calculated

Step – 4 – Last but not least, the parts of the equation that contains ‘ADDITION’ and ‘SUBTRACTION’ should be calculated

Now, the given expression:

⇒ 9672 ÷ 156 – 5 × 3.2 = √(?)

⇒ 62 – 5 × 3.2 = √(?)

⇒ 62 – 16 = √(?)

⇒ 46 = √(?)

⇒ (46)2 = ?

⇒ 2116 = ?

Question 239

RBI Assistant 2022• Numerical Ability

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

 \( {5\frac{1}{9}} + 7 {\frac{2}{5}} - 11 {\frac{3}{{45}}} = ?\)

  1. AOption (a)

    \(\frac{{150}}{{45}}\)

  2. BOption (b)

    \(\frac{{166}}{{45}}\)

  3. COption (c)

    \(\frac{{13}}{{9}}\)

  4. DOption (d)

    \(\frac{{155}}{{45}}\)

  5. EOption (e)

    \(\frac{{165}}{{45}}\)

View answer & explanation

Correct answer

Answer: (c)C.

\(\frac{{13}}{{9}}\)

Why this answer is correct

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

Step-1: Parts of an equation enclosed in the ‘BRACKETS’ must be solved first

Step-2: Any mathematical ‘OF’ or ‘EXPONENTS’ must be solved next

Step-3: Next the part of the equation that contains ‘DIVISION; and ‘MULTIPLICATION’ are calculated

Step-4: Last but not least, the parts of the equation that contains ‘ADDITION’ and ‘SUBTRACTION’ should be calculated

Now, the given expression:

\( {5\frac{1}{9}} + 7 {\frac{2}{5}} - 11 {\frac{3}{{45}}} = ?\)

⇒ \(\frac{46}{9}\) + \(\frac{37}{5}\) - \(\frac{498}{45}\) = ?

⇒ (230 + 333 - 498)/45 = ?

⇒ 65/45 = ?

∴ ? = 13/9.

Question 240

RBI Assistant 2022• Numerical Ability

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

 ?2 + √1024 = 561

  1. AOption (a)

    28

  2. BOption (b)

    23

  3. COption (c)

    24

  4. DOption (d)

    22

  5. EOption (e)

    None of these

View answer & explanation

Correct answer

Answer: (b)B.

23

Why this answer is correct

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

Step-1: Parts of an equation enclosed in the ‘BRACKETS’ must be solved first

Step-2: Any mathematical ‘OF’ or ‘EXPONEMTS’ must be solved next

Step-3: Next the part of the equation that contains ‘DIVISION; and ‘MULTIPLICATION’ are calculated

Step-4: Last but not least, the parts of the equation that contains ‘ADDITION’ and ‘SUBTRACTION’ should be calculated

Now, the given expression:

⇒ ?2 + √1024 = 561

⇒ ?2 + 32 = 561

⇒ ?2 = 561 – 32

⇒ ?2 = 529

⇒ ?2 = (23)2

⇒ ? = 23

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