Quantitative Aptitude - Arithmetic Ability Questions

The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find two numbers.

How many times the keys of a typewriter have to be pressed in order to write numbers from 121 to 1346?

Which instrument is used for viewing the sun?

In the given figure, O is centere of the circle. Circle has 3 tangents. If angle QPR = 45 deg, then what is the value (in deg) of angle QOR ?

If A and B together do a job in 7.5 days and if A could do the job in 10 days if he worked alone. How many days would B take to do the job if he worked alone?

If x+1x=5, then the value of 6xx2+x+1 is,

If A = (1/0.4) + (1/0.04) + (1/0.004) + ... upto 8 terms, then what is the value of A?

A shopkeeper purchased 10 boxes of pencils containing 10 pencils each at Rs. 100 per box and sold each pencil at a profit 12%. What is the total sale price?