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Placement Papers

TCS, Infosys, Wipro, Cognizant actual papers

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Q.71 Medium Cognizant Questions Cognizant
If all roses are flowers and some flowers are red, then which statement is true?
A All roses are red
B Some roses are red
C No roses are red
D Cannot be determined
Correct Answer:  D. Cannot be determined
EXPLANATION

Roses are a subset of flowers, but we don't know which flowers are red. Some red flowers might not be roses.

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Q.72 Medium Cognizant Questions Cognizant
If a person buys 10 items at Rs. 50 each and sells them at Rs. 60 each, what is the profit percentage?
A 15%
B 18%
C 20%
D 25%
Correct Answer:  C. 20%
EXPLANATION

Cost Price = 10 × 50 = 500. Selling Price = 10 × 60 = 600. Profit = 100. Profit% = (100/500) × 100 = 20%

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Q.73 Medium Cognizant Questions Cognizant
If 5 workers can build a wall in 12 days, how many days will 10 workers take?
A 4 days
B 6 days
C 8 days
D 10 days
Correct Answer:  B. 6 days
EXPLANATION

Work is inversely proportional to number of workers. (5 × 12) = (10 × x), so x = 6 days

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Q.74 Medium Cognizant Questions Cognizant
A number when divided by 12 leaves remainder 5. What is the remainder when the number is divided by 4?
A 0
B 1
C 2
D 3
Correct Answer:  B. 1
EXPLANATION

Number = 12k + 5. When divided by 4: 12k + 5 = 4(3k) + 4 + 1 = 4(3k+1) + 1. Remainder = 1

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Q.75 Medium Cognizant Questions Cognizant
Three numbers are in the ratio 2:3:5. If their sum is 100, what is the largest number?
A 30
B 40
C 50
D 60
Correct Answer:  C. 50
EXPLANATION

Let numbers be 2x, 3x, 5x. Sum = 2x + 3x + 5x = 10x = 100. x = 10. Largest = 5x = 50

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Q.76 Medium Cognizant Questions Cognizant
A person covers 60% of a journey by train, 30% by bus, and the remaining distance of 20 km by walk. What is the total distance?
A 100 km
B 120 km
C 150 km
D 200 km
Correct Answer:  D. 200 km
EXPLANATION

Train + Bus = 60% + 30% = 90%. Walk = 10% = 20 km. Total = 20/0.10 = 200 km

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Q.77 Medium Cognizant Questions Cognizant
If a number is divided by 7, it leaves a remainder of 4. If the same number is divided by 11, what could be the remainder?
A 3
B 5
C 7
D Cannot be determined
Correct Answer:  D. Cannot be determined
EXPLANATION

The number could be 11, 18, 25, 32, etc. (of form 7k+4). When divided by 11, remainders vary: 11→0, 18→7, 25→3, 32→10. Cannot determine uniquely.

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Q.78 Medium Cognizant Questions Cognizant
Two pipes A and B can fill a tank in 12 hours and 18 hours respectively. How long will it take to fill the tank if both pipes are opened together?
A 6.5 hours
B 7.2 hours
C 7.5 hours
D 8 hours
Correct Answer:  B. 7.2 hours
EXPLANATION

Rate of A = 1/12, Rate of B = 1/18. Combined rate = 1/12 + 1/18 = 5/36. Time = 36/5 = 7.2 hours

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Q.79 Medium IBM Questions IBM
Select the word that best completes the analogy: Ephemeral is to Permanent as Verbose is to ____
A Talkative
B Concise
C Silent
D Articulate
Correct Answer:  B. Concise
EXPLANATION

Ephemeral (short-lived) is opposite to Permanent (long-lasting). Similarly, Verbose (using many words) is opposite to Concise (using few words). The analogy requires antonyms.

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Q.80 Medium IBM Questions IBM
In a logical sequence: 2, 6, 12, 20, 30, ?, what is the next number?
A 40
B 42
C 44
D 46
Correct Answer:  B. 42
EXPLANATION

The pattern is n(n+1) where n = 1,2,3,4,5,6... First term: 1×2=2, Second: 2×3=6, Third: 3×4=12, Fourth: 4×5=20, Fifth: 5×6=30, Sixth: 6×7=42.

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