If `a + 1= b + 2 = c + 3 = d + 4 = a + b + c + d + 5`, then `(a+b+c+ d)` is equal to

If a/b = c/d , then ( ( a +c )/( b + d ) ) is equal to

If A : B = 1 : 2, B : C = 3 : 4, C : D = 2 : 3 and D : E = 3 : 4, then what is B : E equal to ?

If a : b = 2 : 3, b : c = 3 : 4, c : d = 4 : 5, find a : b : c : d.

If A, B, C and D are four numbers such that A : B = 2 : 3, B : C = 4 : 5, C : D = 5 : 8, then A : D is equal to

If A : B = 2 : 3, B : C = 3 : 4 and C :D = 3 : 5 then value of A : B : C : D is :