In a triangle ABC, ∠A = 20, ∠B = ∠C = 4θ and θ satisfies 4 sin² θ + 2 sin θ – 1 = θ. What is the ratio of BC to AB ?

A circle is inscribed in a triangle ABC. It touches the sides BC, CA, AB…

Mean marks of 50 students were found to be 78.4. But later it was detected…

If M is the mean of the first 100 even natural numbers, then what is…

The data of different natural numbers 4, 7, 10, 14, 2x + 3, 2x +…

Consider the following table in respect of students of 4 schools who appeared in a…