Quantitative Aptitude - Arithmetic Ability Questions

If a2+1a2 = 38, then find the value of a-1a?

Find the value of 'y' if y84 = 225

The distance between the points (4, 8) and (k,-4) is 13. What is the value of k?

The smallest number, which should be added to 756896 so as to obtain a multiple of 11, is

What is that least number that must be added to the product 684 × 686 to make it a perfect square?

Simple interest on a certain sum of money for 3 years at 14% per annum is half the compound interest on Rs. 10000 for 2 years at 10% per annum. The sum placed on simple interest is

In triangle PQR, A is the point of intersection of all the altitudes and B is the point of intersection of all the angle bisectors of the triangle. If ∠PBR =105°, then what is the value of ∠PAR (in degrees)?

If 7 times the seventh term of an Arithmetic Progression (AP) is equal to 11 times its eleventh term, then the 18th term of the AP will be