Quantitative Aptitude - Arithmetic Ability Questions

The simplest value of 38-212+20318-227+45 is

If x2+ y2+ z2= xy + yz + zx, then what is the value of (7x + 3y – 5z)/5x?

Triangle ABC is similar to triangle PQR and AB : PQ = 2 : 3. AD is the median to the side BC in triangle ABC and PS is the median to the side QR in triangle PQR. What is the value of (BD/QS)2?

The area of a square is 72.25 cm². Find its perimeter (in cm).

Determine the value of z in the equation: z = 20+20+20+20+...∞

A boy running at 10/9 th of his actual speed covers 39 km in 2 hours 20 minutes and 24 seconds. Find the actual speed of the boy (approx.)

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is

If 1-aa3+9 = 19 - a1-a3, then what is the value of a?