Quantitative Aptitude - Arithmetic Ability Questions

For triangle ABC, what would be the equation of median AD if co-ordinates of A, B and C are (-5,4), (-4,0) and (-2,2) respectively?

If x = 4aba+b, then what is the value of x+2ax-2a+x+2bx-2b ?

In the following question, select the odd word pair from the given alternatives.

Three balls ring at intervals of 15, 30 and 45minutes respectively. At what time will they ring together again, if they rang simultaneously at 8.00 AM?

Out of two numbers, 65% of the smaller number is equal to 45% of the larger number. If the sum of the numbers is 2574, then what is the value of larger number?.

ΔXYZ is right angled at Y. If cosX = 3/5, then what is the value of cosecZ ?

If the diameter of a sphere is 14 cm, then what is the surface area (in sq.cm) of the sphere?

The sum of the digits of a 2-digit number is 8. If we add 36 to the number, the new number obtained is a number formed by interchange of the digits. What is the number?