Quantitative Aptitude - Arithmetic Ability Questions

Find the LCM of 0.63, 10.5, 2.1, 4.20

A boy starts from his house and walks at a speed of 5 km/hr and reaches his school 3 minutes late. Next day he starts at the same time and increases hisspeed by 4 km/hr and reaches 3 minutes early. What is the distance (in km) between the school and his house?

A home theatre set is Rs. 4950. If two successive discounts of 20% and 15% are given, then its selling price is

The quadratic equation 1+a2x2+2abx+b2-c2=0 has only one root. What is the value of c21+a2 ?

2 sec2A is equal to

If 2x-y2+(3y-2z)2=0,then the ratio of x:y:z is

In a class there were 28 boys and some girls. In a test the mean score obtained by the boys was 12.5 while that obtained by the girls was 14.5. If the overall average was 13.1, what was the total number of students in the class?

Simplify: (213 x 213 + 187 x 187)