The point R(a,b) is first reflected in origin to R1 and R1 is reflected in X-axis to (-5,1). The co-ordinates of point R are?

When a discount of 20% is given on a jacket, the profit is 28%. If the discount is 13%, then the profit is

What is the value of tan 7π/6?

Product of digits of a 2-digit number is 15. If we add 18 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

A can do a work in 20 days and B in 10 days. If they work on it together for 5 days, then what fraction of work is left.

In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?

If cos3A = X, then value of X?

(secA - 1)/(secA + 1) is equal to?