Quantitative Aptitude - Arithmetic Ability Questions

Smita can finish a work in 12 days and Sam can finish the same work in 9 days. After working together for 4 days they both leave the job. What is the fraction of unfinished work?

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?

If 1-aa3+9 = 19 - a1-a3, then what is the value of a?

Area of 4 walls of a cuboid is 448 sq cm, its length is 18 cm and height is 8 cm. What is its breadth (in cm)?

The discount offered on a Shirt of Rs 500 and a pair of Trousers of Rs 1000 is 20% and 40% respectively. If Ajay bought 2 Shirt and 3 pair of Trousers then what was the effective discount ( in %) he recieved?

The value of 3x9n+1+9x32n-19x32n-6x9n-1 is equal to

For the inequation x^2–7x + 12 > 0, which one of the following is correct ?

The Simplified form of (b3x2a4z3)*(b4x3a3z2)/(a2b4z3) is