# Infosys Logical Reasoning Questions And Answers

Infosys Logical Reasoning Ability MCQs : This section focuses on "Logical Reasoning" of Infosys Exam. These Logical Reasoning MCQs are asked in previous Infosys Recruitment Exams & drives for freshers and will help you to prepare for upcoming exams and recruitment drives.

1. Ramesh speaks truth only in the morning and lies in the afternoon, whereas Suresh speaks truth only in the afternoon. A says that B is Ramesh Is it morning or afternoon and who is A - Ramesh or Suresh.

A. Afternoon.A is Salman

B. Afternoon.B is Shahrukh

C. Afternoon.A is Shahrukh

D. None

View Answer

Ans : A

Explanation: Answer is ofcourse Afternoon, but A can be either Shahrukh or Salman. Here is the complete solution:

A says B is Shahrukh.

Assume it is morning,

Case I: A is actually Shahrukh. He always speaks truth in morning. NOT POSSIBLE.

Case II: A is actually Salman. He always lies in morning. NOT POSSIBLE

Assume it is afternoon,

Case I: A is actually Shahrukh. He always lies in the afternoon and thus says B is Shahrukh. POSSIBLE.

Case II: A is actually Salman. He always speaks truth in the afternoon. POSSIBLE.

Therefore, it is afternoon and A can be either Shahrukh or Salman

2. All birds are animals.

All animals are four legged.

Implications:

a. All animals which are four legged are birds.

b. All birds are four legged

c. Some birds not are four legged

d. Some birds are animals but not four legged

A. a and b

B. b and c

C. only b

D. only d

View Answer

Ans : B

Explanation: a. All animals which are four legged are birds. (False as it is not definite)

b. All birds are four legged (Clearly true as it is definite)

c. Some birds are not four legged (False as it is not definite)

d. Some birds are animals but not four legged (False as it is not definite also if all statements are positive then conclusion can never be negative)

3. One quarter of the time till now from midnight and half of the time remaining from now up to midnight adds to the present time. What is the present time?

A. 9:38

B. 9:56

C. 9:36

D. 9:16

View Answer

Ans : C

Explanation: x is present time

1/4(x)+1/2(24-x)=x

solve it then x = 9:36

4. In a certain code, COMPUTER is written as RFUVQNPC. How is MEDICINE written in the same code ?

A. EOJDJEFM

B. EOJDEJFM

C. MFEJDJOE

D. MFEDJJOE

View Answer

Ans : D

Explanation: There are 8 letters in the word.
The coded word can be obtained by taking the immediately following letters of word, expect the first and the last letters of the given word but in the reverse order. That means, in the coded form the first and the last letters have been interchanged while the remaining letters are coded by taking their immediate next letters in the reverse order.

5. 8, 11, 21, 15, 18, 21, 22, ?

choose which pair of numbers comes next?

A. 25, 18

B. 25, 21

C. 25, 29

D. 24, 21

View Answer

Ans : B

Explanation: This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3

6. What is the angle between two hands when time is 5:30?

A. 15 degree

B. 20 degree

C. 30 degree

D. 45 degree

View Answer

Ans : A

Explanation: At 5:30 minute hand will be at position 6 and hour hand will be exactly between
5 and 6 and will cover 15°, so angle between two hands=30 -15 = 15°

7. What is the value of y?

1. y - 3 = 2

2. y^2= 25

A. 2

B. 3

C. 4

D. 5

View Answer

Ans : D

Explanation: since y - 3 = 2,

from 1st we get y = 5 and
since 2nd statement y^2 = 25

∴ we get y = 5

both the statement are alone sufficient

8. Directions: Each question below has two statements following it. Decide if the statement suffices to answer the question. Choices are:

If a = 5, what is value of b + c?

I) a is the average of the set {a, b, c}

II) ab + ac = 10

A. If only I is sufficient

B. If only II is sufficient

C. If both are required

D. If each can answer independently

View Answer

Ans : B

Explanation: Sufficient. This statement tells us that (a + b + c)/3 = 5, which means that a + b + c = 15. We know that a = 5, so b + c must equal 10.

Sufficient. Knowing that a = 5, this statement tells us that 5b + 5c = 10. Divide both sides by 5 to find that b + c = 2.

9. Look at this series: 2, 6, 18, 54, ?.

What number should come next?

A. 108

B. 148

C. 162

D. 216

View Answer

Ans : C

Explanation: Since 2*3=6, 6*3=18, 18*3=54.

so 54*3=162.

Therefore next number is 162.

10. In a certain code, 15789 is written as AXBTC, 2346 is written as MPDU. How is 23549 written in that code?

A. MPXDT

B. MPADC

C. MPXCD

D. MPXDC

View Answer

Ans : D

Explanation: The numbers are coded as shown:

1 5 7 8 9 2 3 4 6

A X B T C M P D U

i.e., 2 as M,

3 as P,

5 as X,

4 as D and

9 as C.

So, 23549 is coded as MPXDC.

Discussion