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Question 931

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

In the following question, find out the alternative which will replace the question mark.

Rook : Crow ∷ Lemur : ?

  1. AOption (a)

    Cow

  2. BOption (b)

    Owl

  3. COption (c)

    Elephant

  4. DOption (d)

    Monkey

View answer & explanation

Correct answer

Answer: (d)D.

Monkey

Why this answer is correct

Rooks are the members of the Crow's Family.

Similarly, Lemurs are the members of the Monkey's Family.

Hence, Option (4) is correct.

Question 932

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

In the following question, select the related letters from the given alternatives.

DRINK : ETLRP :: ANGLE: ?

  1. AOption (a)

    BJPPJ

  2. BOption (b)

    BPJPJ

  3. COption (c)

    BJPJP

  4. DOption (d)

    BINPJ

View answer & explanation

Correct answer

Answer: (b)B.

BPJPJ

Why this answer is correct

The pattern followed is:

Similarly,

Hence, “BPJPJ” is the correct answer.

Question 933

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

Direction: In the question below are given two statements followed by two conclusions numbered I and II .You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements

No eraser is ball.

All balls are bats.

Conclusions

I. All erasers can be bats.

II. Some bats are not erasers.

  1. AOption (a)

    Only I follows

  2. BOption (b)

    Only II follows

  3. COption (c)

    Both I and II follow

  4. DOption (d)

    None follows

View answer & explanation

Correct answer

Answer: (c)C.

Both I and II follow

Why this answer is correct

Least possible venn diagram is:

Conclusions

I. All erasers can be bats → True

There is no direct relation between erasers and bats and also, there is no restriction on their relationship so, all erasers being bats is a possibility.

II. Some bats are not erasers → True

The bats which are balls can never be erasers.

Hence, both the conclusions follow.

Additional Information

Question 934

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

In a code language, if GARAGE is written as 101021101014 and MEDIA is written as 1614071810, then how will DIAGRAM be written in the same language?

  1. AOption (a)

    07181310211316

  2. BOption (b)

    07181212211016

  3. COption (c)

    07201010211116

  4. DOption (d)

    07181010211016

View answer & explanation

Correct answer

Answer: (d)D.

07181010211016

Why this answer is correct

The logic followed here is 

In each word, 3 is added to each consonant and 9 is added to each vowel.

The code for GARAGE is as follows:

LetterGARAGE
Code07 + 3 = 1001 + 9 = 1018 + 3 = 2101 + 9 = 1007 + 3 =  1005 + 9 = 14

 

The code for GARAGE is 101021101014.

Similarly,

The code for MEDIA is as follows:

LetterMEDIA
Code13 + 3 = 1605 + 9 = 1404 + 3 = 0709 + 9 = 1801 + 9 = 10

 

The code for MEDIA is 1614071810.

Similarly, the code for DIAGRAM is as follows:

LetterDIAGRAM
Code04 + 3 = 0709 + 9 = 1801 + 9 = 1007 + 3 = 1018 + 3 = 2101 + 9 = 1013 + 3 = 16

 

Hence, 'DIAGRAM' is coded as '07181010211016'.

Question 935

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

B and H are the only siblings. H is the only son of P. R is the son-in-law of N. N is the paternal grandmother of G who is the daughter of D. D is the sister-in-law of B. Then how is R related to G?

  1. AOption (a)

    Cousin

  2. BOption (b)

    Uncle

  3. COption (c)

    Father

  4. DOption (d)

    Either niece or nephew 

View answer & explanation

Correct answer

Answer: (b)B.

Uncle

Why this answer is correct

According to given conditions,

1) B and H are the only siblings.

  1. H is the only son of P.

As H is the only son of P, therefore B is the daughter and sister of P and H respectively.

3) D is the sister-in-law of B.

4) N is the paternal grandmother of G who is the daughter of D.

5) R is the son-in-law of N.

Thus, according to the final family tree R is the uncle of G.

Hence, "Uncle" is the correct answer.

Question 936

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

Select the letter-pair that can replace the question mark (?) in the following series.

DWX, FZB, HCF, JFJ, LIN, ?

  1. AOption (a)

    NLR

  2. BOption (b)

    IJK

  3. COption (c)

    PQR

  4. DOption (d)

    ABC

View answer & explanation

Correct answer

Answer: (a)A.

NLR

Why this answer is correct

The logic follows here is :-

According to the Alphabetic order the series follows here is :

Thus, the correct answer is 'NLR'.

Question 937

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

What was the day of the week on 13th November 1997?

  1. AOption (a)

    Saturday

  2. BOption (b)

    Tuesday

  3. COption (c)

    Thursday

  4. DOption (d)

    Sunday

View answer & explanation

Correct answer

Answer: (c)C.

Thursday

Why this answer is correct

The logic follows here is:-

No. of Odd daysSimple YearLeap Year
365/7 = 52 weeks + 1 odd day366/7 = 52 weeks + 2 odd day

 

YearsNo. of odd days
100 years5
200 years3
300 years1
400 years0

Note:- Multiple of 400 years i.e. 800, 1200, 1600, 2000 have 0 odd days.

Calculating leap year: For Finding the number of leap year (1 - 99) years, divide the number of years by 4 and the quotient will be the number of leap years.

Code of weekdays:

No. of odd daysDay
0Sunday
1Monday
2Tuesday
3Wednesday
4Thursday
5Friday
6Saturday

 

 

Total odd days = 0 + 1 + 1 + 2 = 4 odd day.

4 is the code for Thursday

Thus, the correct answer is "Thursday".

Question 938

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

Four number - pairs are given out of which three are alike in a certain way and one is different. Select the number - pair that is different from the rest.

  1. AOption (a)

    (22, 89, 45)

  2. BOption (b)

    (15, 61, 31)

  3. COption (c)

    (12, 49, 25)

  4. DOption (d)

    (13, 52, 27)

View answer & explanation

Correct answer

Answer: (d)D.

(13, 52, 27)

Why this answer is correct

The logic follows here:

(First Number × 4) + 1 = Second Number

(First Number × 2) + 1 = Third Number

1) (22, 89, 45) →

(22 × 4) + 1 = 89

(22 × 2) + 1 = 45

2) (15, 61, 31) →

(15 × 4) + 1 = 61

(15 × 2) + 1 = 31

3) (12, 49, 25) →

(12 × 4) + 1 = 49

(12 × 2) + 1 = 25

4) (13, 52, 27) →

(13 × 4) + 1 = 53 ≠ 52

(13 × 2) + 1 = 27

Hence, "(13, 52, 27)" is the correct answer.

Alternate Method

The logic follows here:

(First Number × 2) + Third Number = Second Number

1) (22, 89, 45) →

(22 × 2) + 45 

= 44 + 45

= 89

2) (15, 61, 31) →

(15 × 2) + 31

= 30 + 31

= 61

3) (12, 49, 25) →

(12 × 2) + 25

= 24 + 25

= 49

4) (13, 52, 27) →

(13 ×2) + 27

= 26 + 27

= 53 ≠ 52

Hence, "(13, 52, 27)" is the correct answer.

Question 939

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

From the given options, which answer figure / figures can be formed by folding the figure given in the question?

  1. AOption (a)

    (a) and (d)

  2. BOption (b)

    (c) and (d)

  3. COption (c)

    (b) and (c)

  4. DOption (d)

    (a) and (c)

View answer & explanation

Correct answer

Answer: (a)A.

(a) and (d)

Why this answer is correct

When we fold a given figure then we get,

By solving the options:

a)

 → It can be formed because there is no opposite phase adjacent to each other.

b)

 → It cannot be formed because opposite phase are adjacent to each other.

c)

 → It cannot be formed because opposite phase are adjacent to each other.

d)

 → It can be formed because there is no opposite phase adjacent to each other.

Hence, (a) and (d) is the correct answer.

Question 940

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

If all the letters in the word 'SIGNATURE',  are arranged according to English alphabetical order, the positions of how many letters will remain unchanged after rearrangement ?

  1. AOption (a)

    One

  2. BOption (b)

    Two

  3. COption (c)

    Three

  4. DOption (d)

    Four

View answer & explanation

Correct answer

Answer: (a)A.

One

Why this answer is correct

Word is - S I G N A T U R E

Arranged according to English alphabetical order - A E G I N R S T U

Hence, only one letter i.e. G, will remain unchanged after rearrangement.