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Categories >> Aptitude Questions >> General Aptitude
 
 


 

 
 English interview questions  English Interview Questions (454)
 General Aptitude interview questions  General Aptitude Interview Questions (1887)
 Puzzles interview questions  Puzzles Interview Questions (460)
Question
A secret can be told only 2 persons in 5 minutes .the 
same person tells to 2 more persons and so on . How long 
will take to tell it to 768 persons ?
 Question Submitted By :: Jeba
I also faced this Question!!     Rank Answer Posted By  
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 1
30 minutes 
Is This Answer Correct ?    5 Yes 55 No
Sameer
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 2
45 minutes.
increases by 2 after every 5 minutes.
 
Is This Answer Correct ?    16 Yes 30 No
Jackass
 
 
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 3
47.5 
Is This Answer Correct ?    79 Yes 9 No
Sourav
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 4
1->2->4->8....by 10 minutes it will reach 1024 persons. so
it will take 10 minutes to 768 persons
 
Is This Answer Correct ?    2 Yes 41 No
Jayanthi
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 5
5 min-2
10-4
15-8
20-16
25-32
30-64
35-128
40-256
45-512
47.5-768

r u clear friends..
 
Is This Answer Correct ?    186 Yes 11 No
Harry
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 6
no way,wat a que?
nice ques
Ans is 47.5.Its sure.
 
Is This Answer Correct ?    23 Yes 6 No
Rajez
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 7
i don't understand, why are you ppl not counting the ppl who
have been told the secret before

5 min-2
10-4, total so far=6
15-8, total so far=14
20-16, tsf=30
25-32, tsf=62
30-64, tsf=126
35-128, tsf=254
40-256, tsf=510
45-512, tsf=1022
---------------
50-1024, tsf=xyz

clearly ans should lie between 40 & 45...the options
definitely do not include the correct one!

you can also solve it by using binary tree + GP + log and
find the ans to be around 43
 
Is This Answer Correct ?    11 Yes 11 No
Crazyfantaxy
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 8
47.5mins 
Is This Answer Correct ?    10 Yes 8 No
Guest
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 9
47.5 mins
because 2^9=512
& 2^10=1024 but
total no. of persons=768
i.e 512+256(or 2^8)
so for 9th iteration it is 9*5=45mins
but after that only half persons(512/2=256) are to be
informed which will take 2.5mins(5/2). so
the final answer will be 45+2.5=47.5 mins....
 
Is This Answer Correct ?    29 Yes 7 No
Jyoti Chandra Azad
 
  Re: A secret can be told only 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
Answer
# 10
ans: 45 min



thank you
 
Is This Answer Correct ?    3 Yes 12 No
Srinu M
 

 
 
 
Other General Aptitude Interview Questions
 
  Question Asked @ Answers
 
On a given day, a bank had 16000 cheques returned by customers. Inspection of the first 800 cheques indicated that 100 of those 800 had errors and were therefore the available immediately for data processing. On this basis, hwo many cheques would be available immediately for data processing on that day? TCS 6
if length of a rectangle is incr by 20% and width is decr by 20% then area Verifone 5
How many meaningful English word can be formed by using the second, the fifth, the seventh and the tenth letters of the word APPROPRIATION, each only once, but in different sequence ? (a) One (b) Two (c) Three (d) None of these (e) More than three Banking 3
Present population of town is 35,000 having males and females. If The population of males is increased by 6% and if the population of females is increased by 4%, then after 1 year the population becomes 36,700. Find the number males and females ? L&T 8
A+B+C+D=D+E+F+G=G+H+I=17 where each letter represent a number from 1 to 9. Find out what does letter D and G represent if letter A=4. give the steps CTS 3
Rearrange MERGANY   4
There are 3 persons X, Y and Z. On some day, X lent tractors to Y and Z as many as they had. After a month Y gave as many tractors to X and Z as many as they have. After a month Z did the same thing. At the end of this transaction each one of them had 24. Find the tractors each originally had?   5
At 6'o clock clock ticks 6 times. The time between first and last ticks was 30sec. How much time it takes at 12'o clock. Mascot 8
virtual memery size depand on   4
In town of 500 people, 285 read Hindu and 212 read Indian express and 127read Times of India 20 read Hindu and times of India and 29 read hindu and Indian express and 35 read times of India and Indian express. 50 read no news paper. Then how many read only one paper? Cognizent 11
Geetanjali wrote by? Yardi 4
Two chords of lengths 2L1 and 2L2 are drawn in a circle. Their lengths are inversely proportional to the straight distance joining the centre.Find the radius of circle? Mascot 1
 
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