Quantitative Aptitude - Arithmetic Ability Questions

The first and last terms of an arithmetic progression are 29 and -49. If the sum of the series is -140, then it has how many terms?

Ramesh uses a weight of 930 gm instead of 1 kg and sells sugar on its cost price. What will be his profit percentage on selling 15 kg sugar?

Find the range of the data : 11,13, 9, 17, 13, 19, 10, 11

The mean of marks secured by 30 students in division-A of class X is 67, 55 students of division-B is 63 and that of 40 students of division-C is 61. What is the mean of marks of the students of three divisions of Class X?

In a class of 50 students there are 27 girls. The average weight of these girls is 45 kg and average weight of the full class is 49.6 kgs. What is the average weight of the boys of the class?

What is the value of xy if x - y = 3 and x2+y2=15?

The value of cos (1110°) is

If x = 4aba+b, then what is the value of x+2ax-2a+x+2bx-2b ?