A bag has Rs 30.8 in the form of 1 rupee, 50 paise and 10 paise coins in the ratio of 6:3:2. What is the number of 50 paise coins?

At what rate of compound interest per annum will a sum of Rs 50000 become Rs 73205 in 2 years?

ABCD is a parallelogram. Co-ordinates of A, B and C are (5,0), (-2,3) and (-1,4) respectively. What will be the equation of line AD?

The mean of marks secured by 30 students in division-A of class X is 67, 55 students of division-B is 63 and that of 40 students of division-C is 61. What is the mean of marks of the students of three divisions of Class X?

A shopkeeper by selling 17 Omega watches, earns a profit equal to the selling price of 7 Omega watches. What is his profit percentage?

If in a two digit number, the digit at unit place is z and the digit at tens place is 8, then the number is

[sinA/(1 + cosA)] + [(1 + cosA)/sinA] is equal to

What is the value of 2 consecutive natural numbers, sum of whose squares is 145?