Quantitative Aptitude - Arithmetic Ability Questions

What is the average of all the one digit, two digit and three digit natural numbers?

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?

A solid hemisphere has radius 14 cm. It is melted to form a cylinder such that the ratio of its curved surface area and total surface area is 2 : 3. What is the radius (in cm) of its base?

The ratio of the number of boys and girls in a school is 3:2. If 20% of the boys and 25% of the girls are scholarship holders, the percentage of the school students who are not scholarship holders is

If X is a prime number, LCM of X and its successive number would be

A discount of 45% on an article is equal to the discount of 65% on other article. What is the respective ratio of the marked price of both the articles?

If 2x - 3 = 3x - 5, then the numerical value of (x - 3)2 is

Select the odd word/letters/number/number pair from the given alternatives.