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Question 141

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

Priya is sitting 45th from left end and Vidya is sitting 32nd from right end of the row. If there are 100 students in a row, find the number of persons sitting between Priya and Vidya.​

  1. AOption (a)

    23

  2. BOption (b)

    13

  3. COption (c)

    12

  4. DOption (d)

    24

View answer & explanation

Correct answer

Answer: (a)A.

23

Why this answer is correct

Number of persons between two different persons = Total number of persons – (Position of the person from left + Position of persons from right)

Sum of positions of Priya and Vidya from opposite ends = 45 + 32 = 77, i.e. less than the total number of students (<100)

Therefore, number of students between Priya and Vidya = Total number of students - (Position of Priya from left + Position of Vidya from right)

100 – (45 + 32) = 100 – 77 = 23

Hence, 23 is correct.

Question 142

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

If in a certain coding language, 'DUSTBIN' is written as '28-18-4-40-38-42-8'. How will 'ANDROID' be written in that code language?

  1. AOption (a)

    8-18-30-36-8-28-2

  2. BOption (b)

    8-18-30-2-8-36-28

  3. COption (c)

    8-18-30-36-8-2-28

  4. DOption (d)

    2-28-8-36-30-18-8

View answer & explanation

Correct answer

Answer: (a)A.

8-18-30-36-8-28-2

Why this answer is correct

Given - 'DUSTBIN' is written as '28-18-4-40-38-42-8'

Similarly;

Hence, the correct answer is 8-18-30-36-8-28-2.

Question 143

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

Please read the given information carefully and then answer the questions given.

The eight friends A, B, C, D, E, F, G, and H are sitting on a circular table facing towards the center, (they do not have to be the same).

i. The location of A is the third to the right of F, which is sitting on the left of the D on the second number.

ii. C and H are sitting face to face with each other.

iii. None of F and C are sitting next to B.

iv. B is not sitting in between H and A.

v. G is seated opposite A.

How many people are sitting between G and E of the given options?

  1. AOption (a)

    4

  2. BOption (b)

    1

  3. COption (c)

    3

  4. DOption (d)

    0

View answer & explanation

Correct answer

Answer: (a)A.

4

Why this answer is correct

The arrangement will be as shown below:

  • Here, there are 2 possibilities: 
  1. From the left of G, there are two people between G and E.
  2. From the right of G, there are four people between G and E.
  • However, the option given to us is 4. Therefore, we can safely assume that the question is about the right of G.

Hence, ‘4’ people are sitting between G and E.

Question 144

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

Ram is facing North-west. He turns in clock-wise direction by 90º, then 180º in the Anti-clockwise direction, and then another 90º in the same direction. Which direction is he facing now?

  1. AOption (a)

    South-east

  2. BOption (b)

    North

  3. COption (c)

    West

  4. DOption (d)

    North-east

View answer & explanation

Correct answer

Answer: (a)A.

South-east

Why this answer is correct

i) Ram is facing North-west.

Step 1:

He turns in clock-wise direction by 90º.

Step 2:

then 180º in the Anti-clockwise direction.

Final step:

then another 90º in the sane direction.

Drawing the Diagram as per the given information:

Thus we can see finally he is facing in the South-east direction.

Hence, the correct answer is "South-east".

Question 145

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

In a code language 'please come here' is written as 'dc ba fe', 'go out please' is written as 'ba hg ji' and 'come and go' is written as 'lk dc hg'. How will 'out' be written in the same code language?

  1. AOption (a)

    ba 

  2. BOption (b)

    ji

  3. COption (c)

    fe

  4. DOption (d)

    lk

View answer & explanation

Correct answer

Answer: (b)B.

ji

Why this answer is correct

So.  'out' will be written as ji.

Hence, the correct answer is ji.

Question 146

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

Directions

Find the wrong term in the following series.

R3C, P8F, N15I, L31L, J63O

  1. AOption (a)

    P8F

  2. BOption (b)

    N15I

  3. COption (c)

    L31L

  4. DOption (d)

    J63O

View answer & explanation

Correct answer

Answer: (a)A.

P8F

Why this answer is correct

Given series: R3C, P8F, N15I, L31L, J63O

The logic followed for the alphabet is:

The logic followed for the number is:

3

3 × 2 + 1 = 7

7 × 2 + 1 = 15

15 × 2 + 1 = 31

31 × 2 + 1 = 63

So, 8 is wrong and must be replaced by 7 number.

Hence, P8F is the wrong term in the series.

Question 147

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

Select the figure that will come next in the following series.

  1. AOption (a)

  2. BOption (b)

  3. COption (c)

  4. DOption (d)

View answer & explanation

Correct answer

Answer: (d)D.

Why this answer is correct

The pattern followed here is,

The letter and symbol present in second figure is water image of those of the first figure.

Hence, option (4) is the next image in the series.

Question 148

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

Which of the following figure represents the correct relationship?

Statistician, Men, Physiotherapist

  1. AOption (a)

  2. BOption (b)

  3. COption (c)

  4. DOption (d)

View answer & explanation

Correct answer

Answer: (d)D.

Why this answer is correct

The logic follows here;

Some Men can be Statisticians.

Some Men can be Physiotherapists.

The least possible Venn diagram for the given set of words is:

Hence, the correct answer is Option 4.

Question 149

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

In a certain code language, "SENIOR" is written as "GUMRTQ", how can "JERSEY" be written in that code language?

  1. AOption (a)

    GLIGAH

  2. BOption (b)

    GLIHAG

  3. COption (c)

    GAHILG

  4. DOption (d)

    GLGIAH

View answer & explanation

Correct answer

Answer: (b)B.

GLIHAG

Why this answer is correct

Given - "SENIOR" is written as "GUMRTQ"

Similarly:

Hence, the answer is GLIHAG.

Question 150

DSSSB Junior Assistant (LDC) 2025• Mental Ability & Reasoning 1

In the following questions, three out of the four alternatives are related in some way and one is different from others. Select the odd one.

  1. AOption (a)

    3437

  2. BOption (b)

    2166

  3. COption (c)

    2258

  4. DOption (d)

    7299

View answer & explanation

Correct answer

Answer: (c)C.

2258

Why this answer is correct

Logic: First three digits are the cube of the last digit of the given number. 

343773 = 343
216663 = 216
225883 = 512
729993 = 729

 

Except 2258 all numbers are following the same logic.

Hence, "2258" is the odd one.

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