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21000=7*5*2*5*2*5*2*3
Total 8 rounds


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I think this can be solved by prime factorization (because all numbers are primes):

21000/7 = 3000
3000/5 = 600
600/5 = 120
120/2 = 60
60/3 = 20
20/5 = 4
4/2 = 2
2

So we have 7*5*5*2*3*5*2*2 = 21000
So my answer would be 8.
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ramyapilai
21000=7*5*2*5*2*5*2*3
Total 8 rounds


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Here's your mistake
Who told you that Ross Got Points in every round he completed.
What if he got no points in 7 rounds ?

The correct answer is E

If you understand HIT that Kudos ..!!

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Kocket
I think this can be solved by prime factorization (because all numbers are primes):

21000/7 = 3000
3000/5 = 600
600/5 = 120
120/2 = 60
60/3 = 20
20/5 = 4
4/2 = 2
2

So we have 7*5*5*2*3*5*2*2 = 21000
So my answer would be 8.

you sure?
what if ross did not end by getting points in 10 rounds (say)
then the number of rounds he participated will be 18
so we can have numerous such examples
hence E
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Kocket
I think this can be solved by prime factorization (because all numbers are primes):

21000/7 = 3000
3000/5 = 600
600/5 = 120
120/2 = 60
60/3 = 20
20/5 = 4
4/2 = 2
2

So we have 7*5*5*2*3*5*2*2 = 21000
So my answer would be 8.

you sure?
what if ross did not end by getting points in 10 rounds (say)
then the number of rounds he participated will be 18
so we can have numerous such examples
hence E


The question says that the product of his points is 21000.
If he does not get points in one round he gets zero points for that round, right?
Then the product of his points would always be zero if he gets no points for one round.
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Kocket
Chiragjordan
Kocket
I think this can be solved by prime factorization (because all numbers are primes):

21000/7 = 3000
3000/5 = 600
600/5 = 120
120/2 = 60
60/3 = 20
20/5 = 4
4/2 = 2
2

So we have 7*5*5*2*3*5*2*2 = 21000
So my answer would be 8.

you sure?
what if ross did not end by getting points in 10 rounds (say)
then the number of rounds he participated will be 18
so we can have numerous such examples
hence E


The question says that the product of his points is 21000.
If he does not get points in one round he gets zero points for that round, right?
Then the product of his points would always be zero if he gets no points for one round.


Think again..
Getting a zero is very different from getting no score..
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Chiragjordan
Kocket
The question says that the product of his points is 21000.
If he does not get points in one round he gets zero points for that round, right?
Then the product of his points would always be zero if he gets no points for one round.


Think again..
Getting a zero is very different from getting no score..


Okay if no score is different from getting zero it makes sense.
Thanks :)
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i am still not able to understand why the correct answer is e option and not option a?
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So can 8 be the MINIMUM number of rounds he played??
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sudhirgupta93
So can 8 be the MINIMUM number of rounds he played??

Yes mate.
8 has to be the minimum number here.








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rhine29388
i am still not able to understand why the correct answer is e option and not option a?

Correct answer is E and not A because we are given that there won't be any points awarded for rounds other than 1st four.

Thus, it may happen that he played 100 rounds out of only 8 rounds were there in which he was awarded some points.
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If he played more than 8 rounds, and didn't come in the top 4 in any of the extra rounds, the product of his scores should be 0 since he scored 0 points in some rounds.
Here, they have said Product=21000, so how did he play more than 8 rounds?
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