Quantitative Aptitude - Arithmetic Ability Questions

What is the unit digit of the sum of first 111 whole numbers?

If the curved surface area of a right circular cone is 3080 sq cm and its slant height is 35 cm, find its total surface area?

In the given figure,PQ = PS = SR and QPS = 40 deg, then what is the value of QPR (in deg) ?

Deepak sells all his goods available in his shop at the cost price, but he cheats his customer and gives 20% less goods as he should give. Find his % profit.

The average age of A and B is 18 years. After 3 years, C joins them and the average ages of A, B and C becomes 22 years. The age of C is ?

The marked price of a sofa set is Rs 4800 which is sold at Rs 3672 at two successive discounts. If the first discount is 10%, then what will be the second discount (in %)?

Vikram and Vivek can finish a work in 50 days. They worked together for 20 days and then left. How much work has been done by them?

A solid sphere of diameter 7 cm is cut into two equal halves. What will be the increase (in cm2) in the total surface area ?