-
Aishwarya1204
- Junior | Next Rank: 30 Posts
- Posts: 18
- Joined: Sun Oct 14, 2012 1:08 am
If n is a positive integer and the product of all the integers from 1 to n inclusive is a multiple of 990, what is the least possible value of n.
a) 10
b) 11
c) 12
d) 13
e) 14
The answer is b
I came to this answer simply by noticing that 11 is a factor of 990 and its a prime so we would definitely need 11 to be in the numbers ( 1 to n ).
Is there an actual method to this question?
a) 10
b) 11
c) 12
d) 13
e) 14
The answer is b
I came to this answer simply by noticing that 11 is a factor of 990 and its a prime so we would definitely need 11 to be in the numbers ( 1 to n ).
Is there an actual method to this question?
