# Question 19 & Question 20

## Question 19 & Question 20

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

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

**TECHNOTHLON**- Admin
- Posts : 39

Join date : 2016-07-19

## Re: Question 19 & Question 20

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

20) Help me

20) Help me

**Ayush1234567**- Posts : 30

Join date : 2016-07-21

## Re: Question 19 & Question 20

Parth can you please tell me how bro?

**Ayush1234567**- Posts : 30

Join date : 2016-07-21

## Re: Question 19 & Question 20

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

**Parth**- Guest

## Re: Question 19 & Question 20

The question Asks for possible no. of times

----> 25 is one solution

How many solutions are possible is asked by the question

----> 25 is one solution

How many solutions are possible is asked by the question

**No you are wrong**- Guest

## Shivam Mittal

I am able to came to the solution at last

Ques 19-D I have solved it

Ques 20-B these are correct

Ques 19-D I have solved it

Ques 20-B these are correct

**Shivam Mittal**- Guest

## Shivam Mittal

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

In this way in 49 times all doors get opened

**Shivam Mittal**- Guest

## Re: Question 19 & Question 20

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

**SidRis**- Guest

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