Quantitative Aptitude - Arithmetic Ability Questions

Average age of 6 boys is 14 years. Average age of 11 girls is 12 years. What is the average age (in years) of all boys and girls?

The perimeter of two similar triangles ABC and PQR are 36 cms and 24 cms respectively. If PQ = 10 cm then the length of AB is

Car B is twice as fast as car A. If car A covers 90 km in 2 hours, what is the speed of car B?

The traffic lights at four different road crossings change after every 15 sec, 18 sec, 27 sec and 30 sec respectively. If they all change simultaneously at 6:10:00 hours, then at what time will they again change simultaneously?

What is the distance between the points (4,7) and (­1,­5)?

After buying a toy for Rs. 66, Raghu managed to sell it at a profit of 15%. The selling price of the toy was

Find the number that is as much greater than 39 as is less than 79.

If the number x3331 is divisible by 11, what is the face value of x?