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(#M40040010) SELF Logical Reasoning question logic Keep an EYE

100 people standing in a circle in an order 1 to 100. No.1 has a sword. He kills next person (i.e.no. 2 )and gives sword to next to next (i.e no.3). All person does the same until only 1 survives. Which number survives at the last?

BHASKAR MANDAL (10 years ago)

Solved BHASKAR MANDAL Read Solution (14)

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Narasapu Hari prasad  (10 years ago)

73 rd person survives

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BHASKAR MANDAL  (10 years ago) Best Solution

my answer logic rules:
(i) if the last people survived of the next series remains same then the first person is killed
(ii)if the last person of the next sequence is less than the 1st series then the 1st person remains alive
(iii)all the sequence goes with an increment like 2,4,8,16,32,.....

these are the people survived

1,5,7,......99 (diff 2)
1,7,11,.....97 (diff 4),(here 97 1st will be killed
9,25,.......89 (diff 16)
9,41,73 (diff 32)
9,73 (diff 64)
73 is the last man to be alive

done!!!

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khushboo goenka  (10 years ago)

1
coz afteer 1 round remain will 1,3,5,7,9....99
aftr 2nd remain 1,5,9,13....97
aftr 3rd 1,9,17,..96

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shaurya neel  (10 years ago)

25th person survived....is it r8????

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BHASKAR MANDAL  (10 years ago)

no its not, shaurya neel try again

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Narasapu Hari prasad  (10 years ago)

39 the person survives

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BHASKAR MANDAL  (10 years ago)

khushboo goenka, your process is correct please proceed further.
you will not get 1

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surbhi dubey  (10 years ago)

ans ;;;;is 1

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arun  (10 years ago)

73 is the ans

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kaviya  (9 years ago)

ans : 1 all are stand in circle so the 99th survives kills the 100th survives so at last stand the first survives

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S R Y Farhan  (9 years ago)

73 rd person will left , series of A.P will form and commom diffrence will increase atlast resulting in the only person left i.e 73 rd . i needed alteast 10 min to solve this question . Any shorter trick ? plz share

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Nitheesh Aithu  (9 years ago)

73



1,5,7,......99 (diff 2)
1,7,11,.....97 (diff 4),(here 97 1st will be killed
9,25,.......89 (diff 16)
9,41,73 (diff 32)
9,73 (diff 64)
73 is the last man to be alive

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Arpit dubey  (9 years ago)

#bhaskar mandal brother in between 1 and 5 there is a diff of 4 n u are saying that diff is 2....??? wats the logic behind this?
as no. 1 kills no 2 then the sword will be in the hands of no 3 or no 5? as mentioned in the question that the sword is passed to "next to next" i.e no 3??????

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sivakumar  (8 years ago)

Ans:73 will survive

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