ZIO 2021 Discussion

22

Wait what’s the key?

23

Please give me the discord link

24

I think you are right, except 3rd one I didn’t get 3rd one was too lasy to do :slight_smile:

25

There’s no key as of yet, best you can do is tally with the answers here.

26

Could you tell the solution for the first one, I’m getting wrong :grimacing:

27

How much would be cutoff??

28

Let’s pool the scores bro and we’ll get to know an approx of how much cutoff will be

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29

Here is the link : https://discord.gg/UGgtuCAh

30

I have disabled public access to the G-Sheets due to spam.
Fill up this form : Click here

Link to the scores spreadsheet (view only) : Click here

32

Is anyone here from mumbai center…?

33

Bro i guess your Q4,5,6 is correct

34

1st 75
4th 2
5th 4
6th 5
7th 121
8th 2622
9th 162153
10th 3
11th 7
12th 24

35

Can the question 1st (part - a and c) be solved with dp(as these both cases contain only 0 and 1 , so we can consider it as a binary string).

Dp(x) = Dp(x-1)*2 + F(x)
F(x) = 2^(x-3) - Dp(x-3) - F(x-1) - F(x-2) ------ { for overlappping cases}
this will give us the cases which contain 010.

Then, to calculate the cases without 010 we can do 2^x - Dp(x).

36

Answer to Q9 is 162151, not 162153

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37

Yaa right…mine too

38

What about Q1 part 1

39

Siddhant Attavar in CC Discord group has bruteforced the solutions to the paper : Click here

And someone again from CC Discord Group has written the Question Paper : Click here to view ZIO 2021 Question Paper

40

By matching the answer I am getting 50 what are the chances of me getting selected if I’m in class 12
According to me, last 3 ques seems easy and majority may have done it and it feels like the cutoff also will be in the range 70-80.
what are your thoughts on it.

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41

I would say just wait for the results (I am waiting too). Nothing can be said (if you know what happened last time).

42

Just change the number to base 9.
100000 in base 9 will be 162151.