Chiragjordan wrote:

Kocket wrote:

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.

_________________

Genius is considered as madness until you are successful.

Genialität ist solange Wahnsinn bis man Erfolg hat.

GMATPrep No. 1 -> 640

GMATPrep No. 2 -> 640

GMAT -> 670