Quantitative Aptitude - Arithmetic Ability Questions

A sum of money invested at simple interest becomes 13/10 of itself in 2 years and 6 months. What is the rate (in percentage) of interest per annum?

What is the value of (cot45 - √2) ?

Select the odd letters from the given alternatives.

Find the odd words/letter/number from the given alternatives:

If -3[1-(x/2)] + 5x/3 = 1/6, then what is the value of x?

What is the reflection of the point (4, 7) in the line y = -1?

A person borrows some money for 8 years at a rate of simple interest. If the ratio of principal and total interest is 5 : 8, then what is the rate ( inpercentage) of interest?

Pipes A, B, and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hours, respectively, the third can drain the cistern, when filled, in 6 hours. If all the three pipes are opened simultaneously when the cistern is three-fifth full, how many hours will be needed to fill the cistern?