If a + b: b+c : c+a= 6:7:8 and a + b+c= 14, , then the value of c is : 

The value of sec⁴ A (1 – sin⁴A) – 2tan²A is: 

$${I. \sqrt{200x}+\sqrt{102}=0}$$
$${II.\sqrt{160y}+\sqrt{200}=0}$$

Two numbers are 30% and 37% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?

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

Ramesh marks his goods 30% above cost price. If he sells the item for ₹ 910 after allowing of 15% discount. Find his cost price.

Study the following table and answer the equation:
Number of cars sold by dealers A, B, C, D and E during first six months of 2018.

The ratio of the total number of cars sold by dealer B in January, April and June to the total number of cars sold by dealers A and D in March is:

Each internal angle of regular polygon is two times its external angle. Then the number of sides of the polygon is: