Number of positive integral solutions of the equation `(1)/(x)+(2)/(y)=(1)/(4)` is

Let p and q be distinct primes.Then the number of positive integer solutions of the equation (1)/(x)+(1)/(y)=(1)/(pq) is

The number of positive integral solutions of the inequation (x+2)/(x+3)>1

The number of positive integral solutions of the equation x+2y+z=25 is

The number of positive integral solutions of the equation x_(1)x_(2)x_(3)=60 is:

If N is the number of positive integral solutions of the equation x_(1)x_(2)x_(3)x_(4)=770 , then the value of N is

Number of postive integral solution of the equation |x-3|<|2x-1| is

If the number of positive integral solutions of the equation [(x)/[ [pi^(2)] ]] = [(x)/( [11(1)/(2)]] ] is n then the value of n-20 is ( denotes the greatest integer function).

The number of positive integral solutions of the equation x_(1)x_(2)x_(3)x_(4)x_(5)=1050 is (A) 1800 (B) 1600(C)1400(D) None of these