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Logical Problems Questions

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A call center agent has a list of 305 phone nos of people in alphabetic order of names (but she does not have any of the names). she needs to quickly contacts deepak sharma to convey a message to him.If each call takes 2 minutes to complete, and every call is answered, what is the minimum amount of time in which she can guarantee to deliver the message to Mr.Sharma.


A20

B18

C10

D15

Answer: Option B

Explanation:

305/2=152
152/2=71
71/2=35
35/2=17
17/2=8
8/2=4
4/2=2
2/2=0
we get 0 after 9 times.
ans=9*2=18

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In a group of 5, Anooj said"one of us are lying", Pooja said"Exactly two are lying", Bitto said "Exactly three are lying", Billa said"Exactly four are lying", Chitra said,"Exactly five of us are lying". Which one said the Truth?


AAnooj

BBitto

CPooja

DBilla

Answer: Option D

Explanation:

billa is telling truth that exactly four are lying,as there is a group of 5 and the statement of no two people in group matches

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A, B, C and D go for a picnic. When A stands on a weighing machine, B also climbs on, and the weight shown was 132 kg. When B stands, C also climbs on, and the machine shows 130 kg. Similarly the weight of C and D is found as 102 kg and that of B and D is 116 kg. What is D's weight


A58kg

B78 kg

C44 kg

DNone of these

Answer: Option C

Explanation:

A+B=132
B+C=130
C+D=102
B+D=116
A+2B+C=262
B+C+2D=218
A+B-2D=44
132-2D=44
D=44

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Below is a pseudo code Read x

While(x < 60)
write x
x = x*3

The last number in the sequence is 54, what has the user entered as the initial value of x


A2

B5

C3

D4

Answer: Option A

Explanation:

Given Last value int seq. = 54.

and in every Loop result multiplied By 3.

So By Backward Approach

54/3=18 => 18/3=6

=> 6/3=2.

So, The Starting Value Is 2

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A family I know has several children. Each boy in this family has as many sisters as brothers but each girl has twice as many brothers as sisters. How many brothers and sisters are there?


A5 boys and 3 girls.

B3 boys and 4 girls.

C4 boys and 4 girls.

D4 boys and 3 girls.

Answer: Option D

Explanation:

Lets assume no. of girls = x and boys = y
y = (x+1) ----------- (i)
As each boy have equal no. of sisters and brothers and he is not included in brothers.
so, 1 is for him in (x+1).

y = 2(x-1) ------ (ii)
as each girl have (x-1) sisters.
By solving eq. (i) and(ii)
girls = 3 and boys = 4

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In a soap company a soap is manufactured with 11 parts. For making one soap you will get 1 part as scrap. At the end of the day u have 251 such scraps. From that how many soaps can be manufactured?


A25

B22

C28

D30

Answer: Option A

Explanation:

251 scraps will be used to make 22 soaps with remaining 9 scraps. again the 22 soaps will produce 22 scraps.
so 22+9=31 scraps which makes 2 soaps with remaining 9 scraps. Again the 2 soaps will produce 2 scraps.
=> we have 11 scraps which can be used to make 1 soap with 1 scrap as remaining.
Therefore totally,22+2+1=25 soaps.

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Every day a cyclist meets a train at a particular crossing. The road is straight before the crossing and both are traveling in the same direction. The cyclist travels with a speed of 10 Kmph. One day the cyclist comes late by 25 min. and meets the train 5km before the crossing. What is the speed of the train?


A66 kmph.

B40 kmph.

C60 kmph.

D76 kmph.

Answer: Option C

Explanation:

Speed of the train = 60km/hr.


Speed of Cyclist travel = 10km/hr.

It means, Cyclist travels 5km in 30minutes.

If Cyclist comes late by 25 min and meets the train 5km before the crossing means, it shows

Train can travel 5Kms in 5minutes.

So, speed of train is (5 km/5min) = 1 km/1min = 60km per hour.

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Consider two tumblers, the first containing Water and next contains coffee. Suppose you take one spoon of water out of the first tumbler and pour it into the second tumbler. After moving you take one spoon of the mixture from the second tumbler and pour it back into the first tumbler . Which one of the following statement holds now?


AThere is less coffee in the first tumbler than water in the second tumblers

BThere is more coffee in the firs tumbler than water in the second tumbler

CThere is as much coffee in the first tumbler as there is water in the second tumbler

DNone of the statements holds true

Answer: Option C

Explanation:

Here is no explanation for this answer

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In a office, at various times during the day the boss gives the secretary a letter to type, each time putting the letter on the top of the pile in the secretary's inbox. When there is time, the secretary takes the top letter off the pile and type's it. If there are five letter in all , and the boss delivers in the order of 1 2 3 4 5, which of the following could not be the order in which secretary types them.


A2 4 3 5 1

B4 5 2 3 1

C3 2 4 1 5

D1 2 3 4 5

Answer: Option B

Explanation:

Here is no explanation for this answer

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Ahmed, Babu, Chitra, David, and Eesha each choose a large different numbers. Ahmed says, My number is not the largest and not the smallest. Babu says, My number is not the largest and not the smallest. Chitra says, My number is the largest. David says, My number is the smallest. Eesha says, My number is not the smallest. Exactly one of the five children is lying. The others are telling the truth. Who has the largest number?


AEesha

BDavid

CBabu

DChitra

Answer: Option A

Explanation:

Largest -> A B C D E
A F T/F T/F T/F T/F
B T/F F T/F T/F T/F
C F F T F F
D T/F T/F T/F F T/F
E T/F T/F T/F T/F T

From the above table, If we assume that A has the largest then A and C both are lying. Similarly if we find the truthfullness of the remaining people, it is clear that E has the largest and C lied. (Only one F in the last column)

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