Quantitative Aptitude - Arithmetic Ability Questions

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

In a school 60% of the students are girls. If number of boys is 480, then what is the total number of students in the school?

The mean of marks secured by 50 students in division A of class X is 61, 25 students of division B is 57 and that of 50 students of division C is 55. What will be the mean of marks of the students of three divisions of Class X?

U and V started a business by investing amounts Rs 184000 and Rs 224000 respectively. If U’s share in the profit received at the end of year is Rs 20700, then what will be the total profit (in Rs) earned by them together?

The effective annual rate of interest corresponding to a nominal rate of 15% per annum payable half-yearly is

12 men complete a work in 9 days. After they have worked for 6 days, 6 more men join them. How many days will they take to complete the remaining work?

If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?

The area of a rhombus having one side 10 cm and one diagonal 12 cm is