Reasoning PYQs

Given:

Series: 5, 10, 15, 26, 37, 50

The logic followed here is:

n = 2 ⇒ 2² + 1 = 4 + 1 = 5

⇒ 3² + 1 = 9 + 1 = 10

⇒ 4² + 1 = 16 + 1 = 17 (Instead of 15)

⇒ 5² + 1 = 25 + 1 = 26

⇒ 6² + 1 = 36 + 1 = 37

⇒ 7² + 1 = 49 + 1 = 50

∴ The wrong term is 15.

Hence, the correct answer is "Option 3".

Given:

16 # 4 @ 2 = 62

 

If # = × and @ = −

⇒ 16 × 4 − 2

⇒ 64 − 2

⇒ 62 ✔

∴ # = × and @ = −

Hence, the correct answer is "Option 3".

Given:

28 ÷ 4 × 3 − 5 + 7 = 19

Check original (BODMAS):

28 ÷ 4 = 7

7 × 3 = 21

21 − 5 + 7 = 23 ≠ 19 

Swap − and + :

28 ÷ 4 × 3 + 5 − 7

28 ÷ 4 = 7

7 × 3 = 21

21 + 5 − 7 = 19 ✔

∴ The correct signs to swap are − and +.

Interchange + and −

I. 18 ÷ 3 + 8 × 5 - 4 = 20

18 ÷ 3 − 8 × 5 + 4 = 20

6 - 40 + 4 = 20

6 − 44 = 20

• 38 ≠ 20

II. 6 + 8 × 9 ÷ 3 - 4 = 14

6 − 8 × 9 ÷ 3 + 4 = 14

6 - 24 + 4 = 14

6 - 20 = 14

-14 ≠ 14

∴ Both I and II are NOT correct.

Hence correct Option 2.

From the given information,

Based on given data, we can draw the family tree-

 

From the diagram, R,T and S are the children of P.

So P is the Father of S.

Hence correct Option 1.

Series: 2, 6, 12, 20, 30, ?

Differences:

6 − 2 = 4

12 − 6 = 6

20 − 12 = 8

30 − 20 = 10

Pattern: +4, +6, +8, +10, +12

Next term = 30 + 12 = 42

∴ Missing number = 42

Statement: The library will remain closed on Sunday due to renovation.

Conclusion I: The renovation is planned for Sunday.  (This follows because the closure is due to renovation.)

Conclusion II: People cannot use the library this Sunday.  (If the library is closed, people cannot use it.)

∴ Both I and II follow.

Hence correct Option 3.

Statement: The price of petrol has increased due to international oil prices.

Conclusion I: Petrol prices are linked to global markets.  (This follows because the increase is due to international oil prices.)

Conclusion II: The government has no control over fuel prices.  (This is not stated or implied.)

∴ Only Conclusion I follows.

Hence correct Option 1.

The logic followed here is:

DP : XZ

Similarly,

EN : ?

Hence, "Option 4" is the correct answer.

The logic followed here is:

"CANADA" is written as "ADANAC"

"CANADA" → Reverse order → "ADANAC"

Similarly,

"MEXICO" written as

"MEXICO" → Reverse order → "OCIXEM"​

Hence, "Option 2" is the correct answer.

The logic followed here is:

Hence, "Option 1" is the correct answer.

The logic followed here is:

Option 1) Reuse → Action related to conservation / minimizing waste

Option 2) Reduce → Action related to conservation / minimizing waste

Option 3) Recycle → Action related to conservation / minimizing waste

Option 4) Refuel → Means to fill fuel again.

Hence, the correct answer is "Option 4"

Additional Information

Repair → Fixing an item to extend its life and reduce waste.

Reuse → Using an item again instead of discarding it.

Recycle → Converting waste into reusable material.

The logic followed here is:

γ α λ α ξ ι α is coded as GALAXIA

And,

σ τ α ρ is coded as STAR

Similarly,

σ γ α λ α is coded as 

Hence, "Option 1" is the correct answer.

Given:

Total mixture = 30 L

Milk : Water = 3 : 2

Target ratio = 1 : 1

Formula used:

Total parts = 3 + 2 = 5

Milk = Total × (Milk part ÷ Total parts)

Water = Total × (Water part ÷ Total parts)

For 1:1 ⇒ Final water = Milk

Calculations:

⇒ Milk = 30 × 3 ÷ 5 = 18 L

⇒ Water = 30 × 2 ÷ 5 = 12 L

⇒ Required water for 1:1 = 18 L

⇒ Water to add = 18 − 12 = 6 L

∴ Add 6 L water.

Hence, "Option 1" is the correct answer.

Given: Numbers are 12, 18, 30

Calculation:

Prime factorization of 12 = 22 × 3

Prime factorization of 18 = 32 × 2

Prime factorization of 30 = 2 × 3 × 5

Take the highest power of all prime factors: 22, 32, 5

⇒ LCM = 22 × 32 × 5

⇒ LCM = 2 × 9 × 5

⇒ LCM = 180

Hence, "Option 2" is the correct answer.

The logic followed here is:

10 @ 2 = 120 → (10 + 2) × 10 = 12​ × 10 ⇒ 120

And,

5 @ 5 = 100 → (5 + 5) × 10 = 10​ × 10 ⇒ 100

Similarly,

8 @ 3 = ? → (8 + 3) × 10 = 11​ × 10 ⇒ 110

Hence, "Option 4" is the correct answer.

Given: 

1) P is the brother of Q

2) R is the sister of Q

3. S is the father of P

Thus, R is S's daughter.

Hence, the correct answer is "Option 1"

The logic followed here is:

Hence, "Option 1" is the correct answer.

Given: A man's present age is twice what it was 10 years ago.

Let Man's age today be x years

Then, Man's age before 10 years = (x - 10) years

Now, according to the question

⇒ x = 2(x – 10) years

⇒ x = (2x – 20)

⇒ 2x - x = 20

⇒ x = 20 years

Hence, "Option 1" is the correct answer.

The logic followed here is:

​

Thus, it should be 208 instead of 210.

Hence, "Option 1" is the correct answer.