If a,b,c and d are odd natural numbers such that a+b+c+d=20, the number of values of the ordered quadruplet (a,b,c,d) is

If a,b,c,d are odd natural numbers such that a+b+c+d=20 then the number of values of ordered quadruplet (a,b,c,d) is

If a,b,c,d are positive real number such that a+b+c+d=2 , then M=(a+b)(c+d) satisfies the relation:

If a,b,a and d are natural numbers such that a^(5)=b^(6),c^(3)=d^(4), and d-a=61, then the smallest value of c-b is :

If a, b, c and d are four positive real numbers such that sum of a, b and c is even the sum of b,c and d is odd, then a^2-d^2 is necessarily

If a, b, c and d are four positive numbers such that a+b+c+d=4 , then what is the maximum value of (a+1)(b+1)(c+1)(d+1) ?

If a,b,c,d are positive real numbers such that a+b+c +d = 12 , then M = ( a+ b ) ( c + d ) satisfies the relation :

If a,b,c,d are positive real number with a + b + c + d=2 ,then M =(a+b)(c+d) satisfies the inequality

Let a,b,c,d be real numbers such that |a-b|=2, |b-c|=3, |c-d|=4 Then the sum of all possible values of |a-d|=