Quantitative Aptitude - Arithmetic Ability Questions

The two roots of a quadratic equation are given as x = 1/7 and x = -1/8 . The equation can be written as:

The brother is elder to his sister by 6 years. Seven years ago the product of their ages was 72. What is the age of the brother?

What least value must be assigned to '*' so that the numbers 451 *  603 is exactly divisible by 9?

A can do 75% of a job in 18 days and B can do 25% of the job in 12 days. If they work on it together, in how many days can they do 75% of the job?

What is the measure of central angle of the arc whose length is 11 cm and radius of the circle is 14 cm?

A does 60% of a work in 15 days. He then calls B, and they together finish the remaining work in 5 days. How long B alone would take to do the whole work?

The cost of leveling a triangular piece of land whose sides are 72 m. 30 m and 78 in respectively at the rate of 20 paisa per square metre is:

The point P(a, b) is first reflected in origin to P1 and P1 is reflected in Y-axis to (4, -3). What are the co-ordinates of point P?