Quantitative Aptitude - Arithmetic Ability Questions

a, b and c are 3 values, such that a + b = 5, b + c = 7.5 and c + a = 8.5. What will be the average of these values?

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

Find the smallest 8 digit number which is exactly divisible by 121.

Five men or ten women can complete a job in 20 days. In how many days can 3 men and 4 women complete it?

If rsin∅ =1, rcos∅=√3, then the value of r2tan∅ is

Product of 9b2, 3a2 and 4ab is

In a company 2/3 of the workers are girls, 1/2 of the girls are married and 1/3 of the married girls live in hostel. If 3/4 of the boys are married and 2/3 of married boys live in hostel. Calculate the part of workers who don’t live in hostel.