Quantitative Aptitude - Arithmetic Ability Questions

∆DEF is right angled at E. If cosD = 5/13, then what is the value of tanF?

What is the measure of an interior angle of a regular Octagon?

A sum becomes Rs 8800 in 4 years at simple interest at the yearly interest rate of 25% per annum. What is the sum (in Rs)?

If Data Interpretation and Modern Maths were taught for a combined time of 96 hours, then for how much time (in hours) were Number system and Geometry
taught?

A sum of money becomes 77/50 of itself in 18/5 years when invested at simple interest. What is the rate (in percentage) of interest per annum?

By selling an item for Rs. 696 Unnati incurred a loss of 13%. By how much should she have raised the price to gain a profit of 10%?

If a+1a=2 then the vealue of a5+1a5 will be

The area of a circle is 616 sq.m. Find its diameter.