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Question 941

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

Thee statements are given followed by three conclusions I, II and III. You have to consider the two statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusion(s) logically follows/follow from the given statements.

Statements:

All stones are rivers.

All rivers are cars.

Some cars are trains.

Conclusions:

I. Some train are stones.

II. Some cars are stones.

III. Some trains are rivers.

  1. AOption (a)

    Only conclusion I follows.

  2. BOption (b)

    Only conclusion II follows.

  3. COption (c)

    Both conclusions I and II follows.

  4. DOption (d)

    Neither conclusion I nor II follows.

View answer & explanation

Correct answer

Answer: (b)B.

Only conclusion II follows.

Why this answer is correct

The least possible Venn diagram for the given statements is as below:

Conclusions: 

1. Some train are stones → False (As there is no direct relation between stones and train given, it is possible but not definite). 2. Some cars are stones → True (As all the stones are rivers and all the rivers are cars thus we can say some cars will also be stones is a definite conclusion). 3. Some trains are rivers → False (As there is no direct relation between trains and river given, it is possible but not definite).

Hence, the correct answer is "Only conclusion II follows".

Additional Information

Question 942

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

From the given alternative words select the word which cannot be formed using the letters of the given word.

DEPASTURES

  1. AOption (a)

    Easter

  2. BOption (b)

    Sparse

  3. COption (c)

    Sugar

  4. DOption (d)

    Teasers

View answer & explanation

Correct answer

Answer: (c)C.

Sugar

Why this answer is correct

The word ‘Sugar’ cannot be formed using the letters of the word ‘DEPASTURES’ because the letter ‘g’ is not present in ‘DEPASTURES’.

Question 943

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

Vimal who is facing west takes a 120° turn in the anti-clockwise direction. Then he takes a clockwise turn of 90° and again takes a 135° turn in a clockwise direction. Which direction is he facing now?

  1. AOption (a)

    North-east

  2. BOption (b)

    North

  3. COption (c)

    South-east

  4. DOption (d)

    East

View answer & explanation

Correct answer

Answer: (a)A.

North-east

Why this answer is correct

From the given information:

Total clockwise rotation = 90° + 135° =225°

Total anti-clockwise rotation = 120°

Therefore, resultant rotation = 225° - 120° = 105° (clockwise)

Thus, Vimal was initially facing west and then he takes a 105° turn in a clockwise direction as shown in the diagram below:

Hence, Vimal is facing the northeast direction now.

Question 944

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

Seven friends, J, K, L, M, N, O and P, are sitting around a circular table facing towards the centre and at equal distance from each other (not necessarily in the same order). K sits fifth to the left of M. O sits second to the left of M. L is an immediate neighbour of M and sits fourth to the left of P. J is not an immediate neighbour of K. Which among the following pairs denotes the immediate neighbours of N?

  1. AOption (a)

    P, M

  2. BOption (b)

    K, L

  3. COption (c)

    K, M

  4. DOption (d)

    L, P

View answer & explanation

Correct answer

Answer: (c)C.

K, M

Why this answer is correct

  1. K sits fifth to the left of M.

  2. O sits second to the left of M.

  3. L is an immediate neighbour of M and sits fourth to the left of P.

  4. J is not an immediate neighbour of K.

K and M are immediate neighbours of N.

Hence, option 3 is the correct answer.

Question 945

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

Three of the following four words are alike in a certain way and one is different. Pick the odd word out.

  1. AOption (a)

    Joy stick

  2. BOption (b)

    Microphone

  3. COption (c)

    Projector

  4. DOption (d)

    Trackball

View answer & explanation

Correct answer

Answer: (c)C.

Projector

Why this answer is correct

Joystick, Microphone and trackball is the input device and Projector is the output device.

Hence, Projector is the correct answer.

Question 946

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

Directions

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

K15Z, N24T, Q35N, T48H, ?

  1. AOption (a)

    W63B

  2. BOption (b)

    W64B

  3. COption (c)

    V64C

  4. DOption (d)

    V63B

View answer & explanation

Correct answer

Answer: (a)A.

W63B

Why this answer is correct

Given Series: K15Z, N24T, Q35N, T48H, ?

The logic followed for the first letter:

First letters are: K, N, Q, T,

The logic followed for the digit:

Digits are: 15, 24, 35, 48,

4 × 4 – 1 = 15

5 × 5 – 1 = 24

6 × 6 – 1 = 35

7 × 7 – 1 = 48

8 × 8 – 1 = 63

The logic followed for the second letter:

Second letters are: Z, T, N, H,

Hence, the next term will be W63B.

Question 947

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

Direction: Select the related image from the given alternatives.

  1. AOption (a)

    (a)

  2. BOption (b)

    (b)

  3. COption (c)

    (c)

  4. DOption (d)

    (d)

View answer & explanation

Correct answer

Answer: (a)A.

(a)

Why this answer is correct

From the first figure to the second figure, the circle goes inside the triangle and the triangle, in turn, goes inside the square, which turns on to its base. And, from figure third to fourth, the square goes inside the diamond and the diamond, in turn, goes inside the Pentagon, which turns onto its base.

Hence, Figure (a) is the correct answer.

Question 948

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

In a certain code language, "BRAVE" is written as "20", "COMMON" is written as "30". How will "KISHORE" be written as in that language?

  1. AOption (a)

    85

  2. BOption (b)

    42

  3. COption (c)

    75

  4. DOption (d)

    40

View answer & explanation

Correct answer

Answer: (b)B.

42

Why this answer is correct

The positions of the letters according to the English alphabet series:

The pattern for this code is as follows;

Number of letters × (Number of letters - 1)

In BRAVE →

In BRAVE there are 5 letters.

BRAVE = 5 × (5 - 1)

= 5 × 4 = 20

In COMMON →

In COMMON there are 6 letters.

COMMON = 6 × (6 - 1)

= 6 × 5 = 30

Similarly;

In KISHORE →

In KISHORE there are 7 letters.

KISHORE = 7 × (7 - 1)

= 7 × 6 = 42

Hence, "42" is the correct answer.

Question 949

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

Among Zoya, Yash, Xenifer, William and Vihan each scoring different marks in a test. Xenifer scored more than William but not as much as Vihan. Vihan scored more than Zoya, who scored less than Yash. Who did score second highest marks? 

  1. AOption (a)

    Vihan

  2. BOption (b)

    Yash

  3. COption (c)

    Zoya

  4. DOption (d)

    Either Vihan or Yash

View answer & explanation

Correct answer

Answer: (d)D.

Either Vihan or Yash

Why this answer is correct

Five students: Zoya, Yash, Xenifer, William, and Vihan

1) Xenifer scored more than William but not as much as Vihan

Vihan > Xenifer > William

2) Vihan scored more than Zoya, who scored less than Yash

Vihan > Zoya

Yash > Zoya

There is no direct relationship given between Vihan and Yash.

Hence, Either Vihan or Yash scored the second-highest marks.

Question 950

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

Point P is 4 m north of point R. Point U is 10 m east of point V, which is 5 m south of point W. Point Q is north of point S, which is west of point T. Point U is 7 m north of point T. Point R is the middle of the point of Q and point W. Point Q is 6 m to the west of W.

What is the direction of point V with respect to point S?

  1. AOption (a)

    North East

  2. BOption (b)

    North West

  3. COption (c)

    South West

  4. DOption (d)

    North

View answer & explanation

Correct answer

Answer: (a)A.

North East

Why this answer is correct

Eight points P, Q, R, S, T, U, V, and W.

1) Point P is 4 m north of point R.

2) Point R is the middle of the point of Q and point W.

  1. Point Q is 6 m to the west of W.

4) Point U is 10 m east of point V, which is 5 m south of point W.

5)  Point Q is north of point S, which is west of point T.

Hence, point V is in North East of point S.