Quantitative Aptitude - Arithmetic Ability Questions

The sum of the ages of husband and wife at present is 56. Ten years ago the product of their ages was 320. What is the age of the husband and the wife?

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?

If 1-aa3+9 = 19 - a1-a3, then what is the value of a?

A plane flies a distance of 1800 km in 5 hours. What is its average speed in meters/second?

In ∆ABC, ∠A = 90°, AD ⊥ BC and AD = BD = 2 cm. The length of CD is

If x + (1/x) = √13, then what is the value of x5 – (1/x5)?

The number of pupils of a class is 55. The ratio of the number of male pupils to the number of female pupils is 5: 6. The number of female pupils is

The average marks in science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?