If the product of an even number and an odd number is $$840$$, what is the largest possible value of this odd number? 
Overseas Competition->Knowledge Point->Number Theory Modules->Odd and Even Numbers->Multiplication Rules of Odd and Even Numbers
If the product of an even and an odd number is $$840={2^{3}}\times105$$, then the largest possible value of the odd number is $$105$$. 