Aptitude and Reasoning Questions

Q:

A speaks truth in 75% of cases and B in 80% of cases. In what percentage of cases are they likely to contradict each other, narrating the same incident

A) 30/100 B) 35/100
C) 45/100 D) 50/100
 
Answer & Explanation Answer: B) 35/100

Explanation:

Let   A = Event that A speaks the truth

B = Event that B speaks the truth 


Then P(A) = 75/100 = 3/4

P(B) = 80/100 = 4/5

P(A-lie) = 1-34= 1/4 

P(B-lie) = 1-45= 1/5

 

Now, A and B contradict each other =[A lies and B true] or [B true and B lies]

 = P(A).P(B-lie) + P(A-lie).P(B) 

 = 35*15+14*45=720  

 = 720*100= 35%

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Filed Under: Probability

64 29482
Q:

In the following question, select the missing number from the given series.

46, 41, 35, 30, ?, 19, 13

A) 26 B) 24
C) 28 D) 22
 
Answer & Explanation Answer: B) 24

Explanation:
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Filed Under: Number Series
Exam Prep: Bank Exams

1 29476
Q:

A woman going with a boy is asked by another woman about their relationship between them. The woman replied, "My maternal Uncle and the uncle of his maternal uncle is the same". How is the lady related with that boy?

A) Grandmother and Grandson B) Mother and Son
C) Aunt and Nephew D) None of these
 
Answer & Explanation Answer: C) Aunt and Nephew

Explanation:

Clearly, the brother of woman's mother is the same as the brother of the father of boy's maternal uncle. So, the woman's mother's brother is the boy's maternal uncle's father. Thus the woman's mother's brother's son is boy's maternal uncle, i.e woman's mother's  brother's daughter is boy's mother.

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Filed Under: Blood Relations

73 29438
Q:

Sekar started a business investing Rs.25,000 in 1999. In 2000, he invested an additional amount of Rs. 10,000 and Rajeev joined him with an amount of Rs. 35,000. In 2001, Sekar invested another additional amount of Rs.10,000 and Jatin joined them with an amount of Rs.35,000. What will be Rajeev's share in the profit of Rs.1,50,000 earned at the end of 3 years from the start of the business in 1999?

A) Rs. 45,000 B) Rs. 50,000
C) Rs. 70,000 D) Rs. 75,000
 
Answer & Explanation Answer: B) Rs. 50,000

Explanation:

Sekar: Rajeev: jatin = (25000×12+35000×12+45000×12):(35000×24) : (35000×12)

                            = 1260000 : 840000 : 420000

                            = 3 : 2 : 1.

 

Rajeev's Share =Rs.(150000×2/6)

                      =Rs.50000.

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Filed Under: Partnership

30 29418
Q:

In the following question,select the missing number from the given alternatives.

7, 26, ?, 124, 215, 342

A) 63 B) 65
C) 66 D) 67
 
Answer & Explanation Answer: A) 63

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

0 29387
Q:

The length of a diagonal in cm of a rectangle of length 9 cm and width 5 cm is

 

A) 106 B) ±106
C) 2√14 D) ±214
 
Answer & Explanation Answer: A) 106

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

1 29386
Q:

Find the odd word/letters/number from the given alternatives.

 

A) Potato B) Tomato
C) Ginger D) Carrot
 
Answer & Explanation Answer: B) Tomato

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

In a race, the odd favour of cars P,Q,R,S are 1:3, 1:4, 1:5 and 1:6 respectively. Find the probability that one of them wins the race.

A) 319/420 B) 27/111
C) 114/121 D) 231/420
 
Answer & Explanation Answer: A) 319/420

Explanation:

P(P)=14,P(Q)=15,P(R)=16,P(S)=17
All the events are mutually exclusive hence,

 

Required probability = P(P)+P(Q)+P(R)+P(S)

 

14+15+16+17=319420

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Filed Under: Probability

38 29279