Pratpat
The question is not too complex but the phrasing "no less" took me a minute to figure out!!
True, sometimes these things turn all a bit more challenging for the "English as second language" students...
I found myself completely missing a DS question the other day because of the expression "every two of the seven days". Until someone
explained:
"The phrase "different number of letters on any two of the 7 days" means that Juana did not mail the same number of letters on any 2 days OR the number of letters she mailed in 7 days were all different". Then it became much more clear!