(sec A + tan A – 1) (sec A – tan A+1) =?

The sum of all natural numbers between 100 and 200. Which are multiple of 3 will be: 

The value of (81)3.6 * (9)2.7/ (81)4.2 * (3) is __

A shopkeeper purchased two types of wheat costing Rs. 220 per kg and Rs. 300 per kg. In what ratio should he mix the wheat so that he could sell the mixture at the rate of Rs. 360 per kg in order to earn the profit of 25%?

ABCD is a rhombus whose one angle is 60°.Find the ratio of the lengths of its diagonal?

A sum invested at a certain rate of interest per annum, compounded annually, amounts to ₹3,600 in 2 years and to ₹6,480 in 4 years. What is the sum invested?

Speed of boat in downstream and upstream are 32km/hr and 23km/hr. Find the speed of current ?

Table below shows the number of candidates appearing for the interview and the percentage of candidates found eligible for the post in various companies (A, B, C, D, E, F).
Study the Tables and give answer the following Questions.

What is the respective ratio between the number of qualified candidates in Company A and the number of candidates qualified in Company E?