$${I.{(13)^{2}}-14+28=x}$$
$${II.{(16)^{2}}-8×7=y}$$

If tanx = cot(50+3x), then what is the value of x ?

Triangle PQR is such that PQ=9 cm, QR=6 cm, PR=7.5 cm and triangle PQR is similar to triangle XYZ. If XY=18 cm, find the value of YZ.

The ratio of the sum of two numbers and their difference is 5:1. The ratio of the greater number to the smaller number is-

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

What is the difference between the number of units produced in 2017 and the number of units sold in 2014? 

The difference between the compound interest and simple interest of a certain sum of amount is rupees 256.40 for 4 years at 10% rate per annum. Find the sum of money?

For an equilateral triangle, the ratio of the in-radius and the outer- radius is

In a race of 800 metres, A can beat B by 40 metres. In a race of 500 metres, B can beat C by 5 metres. In a race of 200 metres, A will beat C by