Quantitative Aptitude - Arithmetic Ability Questions

A and B together do a job in 12 days and A could do the job in 20 days if he worked alone. How many days would B take to do the job if he worked alone?

(242699 + 167109) ÷ (9946 –9446) = ?

What is the value of [1 – sin (90 – 2A)] / [1 + sin (90 + 2A)]?

If sinA + sin2A = 1 then what is the value of cos2A + cos4A ?

∆LMN is right angled at M. If m ∠N = 45°. What is the length (in cm) of MN, if NL = 6√2 cm?

Two cars travel from city A to city B at a speed of 36 and 54 km/hr respectively. If one car takes 3.5 hours lesser time than the other car for the journey, then the distance between City A and City B is

An equilateral triangle ABC is inscribed in a circle of radius 20√3.
What is the length of the side of the triangle?

Mahesh buys a watch of Rs 300 and sells it. Mahesh gives two successive discount of 15% and 6% to the buyer. What will be the selling price (in Rs) ofthe watch?