If x is the third proportional of 12 and 18 and y is the fourth proportional of 7, 11, 14, then the value of (3y + 2x)/(6y − 6x) is

If a:b=2:3, b:c=4:5, c:d=6:7 and a=24, then the value of a+b+c+d will be

If (a + b) : (b + c) : (c + a) = 5 : 7 : 6, then what is the value of (a - b + c) : (a + b - c) ?

The sum of three numbers is 98. If the ratio of the first to second is 2 :3 and that of the second to the third is 5 : 8, then the second number is:

Two numbers x and y are in the ratio 11 : 13 and their sum is 48. Then y is

In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quantity of water to be further added is: