Quantitative Aptitude - Arithmetic Ability Questions

If x - y = -9 and xy = -20, then find x2 + y2 ?

If C + 1C = 3, then what is the value of C-37+1C7?

Working 7 hours in a day, 4 men can do a piece of work in 8 days. Working 8 hours in a day, the required number of men to perform the same work in 4 days will be

In the given figure, PQ = 30, RS = 24 and OM = 12, then what is the value of ON?

The mean of marks secured by 50 students in division A of class X is 61, 25 students of division B is 57 and that of 50 students of division C is 55. What will be the mean of marks of the students of three divisions of Class X?

Find the value of 200 x 20 x 2 x 0.2 x 0.02 x 0.002 = ?

If x/y = 2/3, then what is the ratio of (3x + 2y) and (3x – y)?

Find out the odd word/letters/number/number pair from the given alternatives.