Quantitative Aptitude - Arithmetic Ability Questions

The mean of marks secured by 65 students in division A of class X is 54, 30 students of division B is 50 and that of 55 students of division C is 48. Find the mean of marks of the students of three divisions of Class X.

Two cycles start from a house with a speed of 24kmph at interval of 15 min. With how much more speed in kmph the woman coming from the opposite direction towards the house has to travel to meet the cycles at an interval of 10 minutes?

The ten's digit of a 2-digit number is greater than the units digit by 7. If we subtract 63 from the number, the new number obtained is a number formed by interchange of the digits. Find the number.

Sum of a fraction and thrice its reciprocal is 31/6. What is the fraction?

Find k, if the line 4x - y = 1 is perpendicular to the line 5x - ky = 2?

The sum of a fraction and 4 times its reciprocal is 13/3. What is the fraction?

Marked price of an item is Rs 200. On purchase of 1 item discount is 22%, on purchase of 4 items discount is 33%. Rabia buys 5 items, what is the effective discount?

At what point does the line 3x + 2y = 12 cuts the Y-axis?