Quantitative Aptitude - Arithmetic Ability Questions

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?

The mean of marks secured by 60 students in division A of class X is 66, 45 students of division B is 62 and that of 75 students of division C is 60. Find the mean of marks of the students of three divisions of Class X.

The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?

If 192 pens cost is Rs.10, how many pens can be bought for Rs.5?

Iftan 450=cot∅, then the value of ∅, in radians is 

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

The bar chart given shows the sales of 3 types of cars in the Indian automotive industry over 4 years. All the sales figures have been shown in terms of 000 units.

What is the respective ratio of total sales of Sedan and total sales of SUV over the period of 4 years?

In a Δ ABC, DE || BC. D and E lie on AB and AC respectively. If AB = 7 cm and BD = 3cm, then find BC:DE