Search Previous Year Questions

Find real questions from previous competitive exam papers with answers and solutions.

Leave the keyword blank to browse saved questions for your selected exam, newest papers first. Add a keyword, year or topic to narrow the results.

Browse complete papers
Showing 10 question(s)
Clear

Question 561

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 2

Directions

In this question, a statement is given followed by two conclusions numbered I and II. You have to consider the statement to be true, even if it seems to be at variance from commonly known facts. You are to decide which of the given conclusions can be drawn definitely from the given statement.

Statement: The government on Friday announced to provide 5 kg free food grains to the 80-crore poor population for May and June 2021.

Conclusions:

I. Government has plenty of surplus funds to make such expenditure.

II. Some citizens of the country may be in dire need of support from the Government.

  1. AOption (a)

    Only conclusion I follows.

  2. BOption (b)

    Only conclusion II follows.

  3. COption (c)

    Both I and II follow.

  4. DOption (d)

    Neither I nor II follows.

View answer & explanation

Correct answer

Answer: (b)B.

Only conclusion II follows.

Why this answer is correct

  • The statement shares a declaration made by the Government to provide food to 80 crore poor citizens of the country during May and June.
  • From what is supplied we cannot conclude that Government has surplus/spare funds to incur such expenses. Therefore conclusion I does not follow.
  • But, from the statement, we can deduce that some citizens in the country might be in desperate need of help from the government as the statement says the food is being provided to the poor. Therefore, conclusion II follows.
  • Hence, Only conclusion II  is true.

Question 562

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 2

In the following figure, the circle represents dairy milk, the triangle represents munch, the square represents park, and the pentagon represents 5-star.

Which of the following numbers represents munch that are park and dairy milk?

  1. AOption (a)

    72

  2. BOption (b)

    33

  3. COption (c)

    39

  4. DOption (d)

    77

View answer & explanation

Correct answer

Answer: (a)A.

72

Why this answer is correct

The require number will lie in intersection of triangle, square and circle.

Hence, 72 is the correct answer.

Question 563

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 2

Select the related word from the given alternatives.

Veterinarian : Animals :: Orthopedic : ?

  1. AOption (a)

    Eyes

  2. BOption (b)

    Kids

  3. COption (c)

    Brain

  4. DOption (d)

    Bone

View answer & explanation

Correct answer

Answer: (d)D.

Bone

Why this answer is correct

Veterinarian is the doctor for animals.

Similarly, Orthopedic is the doctor for bones.

Hence, “Bone” is the correct answer.

Question 564

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 2

Directions

In the question below are given few statements followed by few conclusions. You have to take the given statements to be true even if they seem to be at variance with the commonly known facts and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts.

Statements:

All papers are newspapers.

No pen is newspapers.

Some papers are books.

Conclusions:

I. No pen is paper

II. Some books are newspapers

  1. AOption (a)

    Only conclusion I follows

  2. BOption (b)

    Only conclusion II follows

  3. COption (c)

    Both conclusion I and conclusion II follows

  4. DOption (d)

    Neither Conclusion I nor conclusion II follows

View answer & explanation

Correct answer

Answer: (c)C.

Both conclusion I and conclusion II follows

Why this answer is correct

The possible Venn diagram is as follows: 

For conclusions:

I. No pen is paper → True 

II. Some books are newspapers → True 

Hence, both conclusions I and conclusion II follow is correct.

Question 565

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 2

Directions

In the following question, choose the correct alternative from the given ones that will complete the series:

14890, N, 2975, D, 590, T, 115, J, 20, ?

  1. AOption (a)

    A, 10

  2. BOption (b)

    B, 12

  3. COption (c)

    A, 1

  4. DOption (d)

    Z, 1

View answer & explanation

Correct answer

Answer: (d)D.

Z, 1

Why this answer is correct

The relation among given numbers is

The relation among given letters is

Hence, Z, 1 will complete the series.

Question 566

DSSSB Junior Assistant (LDC) 2025• Numerical Ability & Data Interpretation 1

If the surface areas of two spheres are in the ratio 16 ∶ 9, then their volumes will be in the ratio:

  1. AOption (a)

    27 ∶ 64

  2. BOption (b)

    64 ∶ 27

  3. COption (c)

    4 ∶ 3

  4. DOption (d)

    3 ∶ 4

View answer & explanation

Correct answer

Answer: (b)B.

64 ∶ 27

Why this answer is correct

Concept use:

Volume of Sphere = (4/3)πR3

Surface area of Sphere = 4πR2

Calculation:

Ratio of surface area of two spheres = 16 : 9

Volume of sphere = (4/3)πR3

Surface area of sphere = 4πR2

According to the question,

⇒ 4πR2 / 4πr2 = 16 / 9

⇒ R2 / r2 = 16 / 9

⇒ R / r = 4 / 3

Ratio of volume of sphere = (4/3)πR3 :(4/3)πr3

= 43 / 33 = 64 : 27

Hence, option 2 is the correct answer.

Question 567

DSSSB Junior Assistant (LDC) 2025• Numerical Ability & Data Interpretation 1

In an election a candidate secured 47% of the votes and lost to his only opponent by 276 votes. Find the total number of votes polled. 

  1. AOption (a)

    3800

  2. BOption (b)

    4600 

  3. COption (c)

    4200 

  4. DOption (d)

    4000

View answer & explanation

Correct answer

Answer: (b)B.

4600 

Why this answer is correct

Given:

Candidate secured votes = 47%

Difference in votes = 276

Formula used:

Let total votes be V.

Votes secured by the winning candidate = 53% of V

Votes secured by the losing candidate = 47% of V

Difference = 53% of V - 47% of V

Calculation:

276 = 53% of V - 47% of V

⇒ 276 = (53/100)V - (47/100)V

⇒ 276 = (6/100)V

⇒ 276 = 0.06V

⇒ V = 276 / 0.06

⇒ V = 4600

∴ The correct answer is option (2).

Question 568

DSSSB Junior Assistant (LDC) 2025• Numerical Ability & Data Interpretation 1

In how many years will a sum of Rs. 9,500 amount to Rs. 11,780 at the rate of 8% per annum at simple interest?

  1. AOption (a)

    3

  2. BOption (b)

    2

  3. COption (c)

    4

  4. DOption (d)

    5

View answer & explanation

Correct answer

Answer: (a)A.

3

Why this answer is correct

Given:

A sum of Rs. 9,500 amount to Rs. 11,780 at the rate of 8% per annum at simple interest

Formula used:

Simple interest = P × R × T / 100 [ P = principal, R = rate of interest, T = time]

Calculation:

Let, Time  = T

Simple interest is  (11780 - 9500) = 2280

As per the question,

⇒2280 = 9500 × 8 × T / 100

⇒ T = 3 years

Question 569

DSSSB Junior Assistant (LDC) 2025• Numerical Ability & Data Interpretation 1

What is the value of : 16+60+408+1089\sqrt{16 + \sqrt{60 + \sqrt{408 + \sqrt{1089}}}}

  1. AOption (a)

    4

  2. BOption (b)

    3

  3. COption (c)

    2

  4. DOption (d)

    5

View answer & explanation

Correct answer

Answer: (d)D.

5

Why this answer is correct

Given:

The expression = 16+60+408+1089\sqrt{16 + \sqrt{60 + \sqrt{408 + \sqrt{1089}}}}

Concept:

(A1/2)2 = A

Calculation:

⇒ √[16 + √{60 + √(408 + √1089)}]

⇒ √[16 + √{60 + √(408 + 33)}]

⇒ √[16 + √{60 + √441}]

⇒ √[16 + √{60 + 21}]

⇒ √[16 + √81]

⇒ √[16 + 9]

⇒ √25 = 5

∴ The required result will be 5.

Question 570

DSSSB Junior Assistant (LDC) 2025• Numerical Ability & Data Interpretation 1

The HCF of 74 and another number is 37 while the LCM of those two numbers is 518. Find the second number:

  1. AOption (a)

    333

  2. BOption (b)

    185

  3. COption (c)

    259

  4. DOption (d)

    111

View answer & explanation

Correct answer

Answer: (c)C.

259

Why this answer is correct

Concept Used:

We know that the product of two numbers is equal to the product of their HCF and LCM.

Calculation:

 Let the second number be x. Then, we have:

HCF of 74 and x = 37

LCM of 74 and x = 518

Product of HCF and LCM = 37 × 518 = 19166

Product of 74 and x = HCF × LCM = 37 × 518 = 19166

⇒ x = 19166/74 = 259

Therefore, the second number is 259.

Page 57