Quantitative Aptitude - Arithmetic Ability Questions

If selling price of 39 articles is equal to the cost price of 42 articles, then what will be the profit percentage?

A car travels a certain distance at 24 km/h and comes back at 36 km/h. Find the average speed for total journey.

Three electronic devices make a beep after every 48 sec, 72 sec and 108 sec respectively. They beeped together at 10 a.m. The time when they will next make a beep together at the earliest is

In these questions, a question is given followed by information in three statements. You have to consider the information in all the three statements and decide the information in which of the statement(s) is not necessarily required to answer the question and therefore can be dispensed with. Indicate your answer accordingly How many students from institute 'A' got placement?

I. Number of students studying in institutes A and B are in the ratio of 3:4 respectively.

II. Number of students who got placement from institute B is 120% of the number of students who got placement from institute A

III. 80% of the students studying in institute B got placement.

How long does a train, 75 m long, moving at 60 km/hr take to pass a certain telegraph post?

The length, breadth and height of a cuboid are in the ratio 19 : 11 : 13. If length is 30 cm more than height, then what is the volume (in cub.cm) of this cuboid?

Find two numbers such that their mean proportion is 8 and third proportion is 64.

If a + b = 5 and ab = 6, then what is the value of a3 + b3?