Question 19 & Question 20

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Question 19 & Question 20

Post by TECHNOTHLON on Wed Jul 20, 2016 6:17 pm

Now Mario is at the centre of a circular room, where there are 49 doors around him. Also, he finds a staff, flicking it at a door will toggle 5 consecutive doors, beginning from the door it was flicked at, open doors will be closed while the closed doors will be opened.

Question 19 : Mario’s aim is to apply this flickable staff several times to toggle the state of a single door. What are the possible number of times Mario would have to use this staff to achieve his aim?
(a) 25 (b) 32 (c) 40 (d) 49

Question 20 :
Now suppose, the staff toggles 15 consecutive doors then with how many doors can you acheive his aim of toggling a state of a single door ?
(a) 53 (b) 54 (c) 55 (d) None of these

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Re: Question 19 & Question 20

Post by Pulkit on Thu Jul 21, 2016 8:53 pm

19. c)40
20. c)55

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Re: Question 19 & Question 20

Post by Ayush1234567 on Thu Jul 21, 2016 9:39 pm

19) dont know ( but it should be odd i think)
20) Help me

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Re: Question 19 & Question 20

Post by Parth on Fri Jul 22, 2016 6:40 am

The 19 is surely a.25

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Re: Question 19 & Question 20

Post by Ayush1234567 on Fri Jul 22, 2016 7:03 am

Parth can you please tell me how bro?

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Re: Question 19 & Question 20

Post by Parth on Fri Jul 22, 2016 2:45 pm

When he will say to toggle first door then first five doors would get open. When he will tell to toggle second door the first door would be open, 2-5 would we closed and 6 would be open when you will go on doing this in 5 times all 10 doors would be toggled now start from 11 door to 20 door and so on. When you would reach 49 th door it would be 25 steps

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Re: Question 19 & Question 20

Post by No you are wrong on Fri Jul 22, 2016 9:14 pm

The question Asks for possible no. of times
----> 25 is one solution
How many solutions are possible is asked by the question

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Shivam Mittal

Post by Shivam Mittal on Sat Jul 23, 2016 10:00 pm

I am able to came to the solution at last
Ques 19-D I have solved it
Ques 20-B these are correct

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Re: Question 19 & Question 20

Post by The answers.org on Sat Jul 23, 2016 10:21 pm

@shivam mittalHow?
And by the way are you sure?

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Re: Question 19 & Question 20

Post by Rishita Jain on Sat Jul 23, 2016 10:27 pm

how? Rolling Eyes

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Re: Question 19 & Question 20

Post by JE18010126 on Sun Jul 24, 2016 11:52 am

Are u sure 19 is D

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Re: Question 19 & Question 20

Post by Vedantsaboo on Sun Jul 24, 2016 3:11 pm

Please explain how?

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Re: Question 19 & Question 20

Post by JE18010126 on Sun Jul 24, 2016 3:23 pm

How Mr Shivam????

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Shivam Mittal

Post by Shivam Mittal on Sun Jul 24, 2016 8:20 pm

Firstly 5-5 doors are opened but when 45 doors are opened we again do magic 4 more doors open but first door closed then we again do magic first door opened and next 4 doors closed
In this way in 49 times all doors get opened

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Re: Question 19 & Question 20

Post by SidRis on Mon Jul 25, 2016 2:58 pm

The question is asked in a confusing manner which is difficult to understand.

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Re: Question 19 & Question 20

Post by Gitanjit on Thu Jul 28, 2016 1:13 pm

20 is b

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Re: Question 19 & Question 20

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