Quantitative Aptitude - Arithmetic Ability Questions

If 2 cos θ = 2 – sin θ, then what is the value of cos θ?

If x2+1x2 = 98, then x3+1x3 = ?

If A is 40% more than B, then B is how much percent less than A?

Find measure of central angle of the sector whose perimeter is 25 cm and radius of the circle is 7 cm?

The difference between cost price and selling price is Rs 494. If loss percentage is 19%, then what is the selling price (in Rs)?

What is the value of x3-1x3+8 when 8x-8x-16=0 ?

Calculate the value of 61681 x 61681 - 31681 x 3168130000?

If a - b = 4 and ab = -3, then what is the value of a3- b3?