Quantitative Aptitude - Arithmetic Ability Questions

If the perimeter of a semicircle is 108 cm, then find its area (in cm²).

If a+1b = 1 and b+1c = 1 then c+1a = ?

If the age of Rahul is 5 years more than his friend Ajay's age and the age of Rahul's wife is 6 years less than Rahul, and Ajay's wife is 1 year older than Rahul's wife, then which of the following statements is true?

If the length of one side and the diagonal of a rectangle are 8 cm and 17 cm respectively, then find its perimeter

If after giving a discount of 18%, a book is sold for Rs 1599, then what will be the marked price (in Rs) of the book?

What is the value of √121 + √12321 + √1234321 + √123454321?

A boy in a train notices that he can count 31 telephone posts in 60 seconds. the distance between two posts is 60 meters. Calculate the speed of the train?

The mean of 10 observations is 13. Two more observations are included and the new mean becomes 14. The mean of two new observations is