The following table shows the number of units of product produced and sold by a company during six years.

Find the ratio of the total number of units sold in 2013 and 2015 to the number of units sold in 2015 and 2016?

The average of a,b,c is 20 and that of b,c,d is 25, if d=30, then the value of a is-

The simple interest and the true discount on a certain sum for a given period and at a given rate are 25 and 20 respectively. The sum is 

The sum of three consecutive numbers is 87. The middle number is : 

The value exponential form of   $$\sqrt {\sqrt{2}×{\sqrt{3}}}$$

Two equal circles of radius 4 cm intersect each other such that each passes through the center of the other. The length of the common chord is

If (a+b)=16 and a³+b³=1456, then what is the value of ab?

After an increase in tea price by 40% a family reduce its consumption of tea to the extent that there should be an increase on tea expense only by 10%. If the earlier consumption of tea was 28 kg, then what will be their new consumption?