Quantitative Aptitude - Arithmetic Ability Questions

2sin[(C+D)/2].cos[(C­-D)/2] is equal to

4 + 16 x -12 x 24 - 13 - 3 ÷ 20 - 4 = ?

On dividing 221a2b2 by 13b2, we get _____.

A, B and C can complete a work in 20, 24 and 30 days respectively. All three of them starts together but after 4 days A leaves the job and B left the job 6days before the work was completed. C completed the remaining work alone. In how many days was the total work completed?

The mean of marks secured by 45 students in division A of class X is 56, 40 students of division B is 52 and that of 40 students of division C is 50. Find the mean of marks of the students of three divisions of Class X.

A, B and C can work together for Rs. 550/- A and B together are to do 7/11 of the work. The share of C should be?

If (secA - tanA)2 = x, then the value of x is

Ram and Rahim standing at a distance of 680m run towards each other at a speed of 8 m/sec and 9 m/sec respectively. After how long will they meet?