Quantitative Aptitude - Arithmetic Ability Questions

Pipe A can empty a filled tank in 28 hours while Pipe B can fill the same tank, when empty in 35 hrs. If alternatively Pipes A and B are turned on for an hour each time, starting when the tank is full, how long will it take to empty the tank?

The area of a semicircle is 1925 sq.cm. Calculate its perimeter (in cm).

In Δ ABC , if ∠BAC = 90° and AB = AC , then ∠ABC is

In an isosceles triangle ABC, AB = AC, XY || BC. If ∡A = 30, then ∡BXY =

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

K is 5 years older to H. H is 3 years younger to R. R is 6 years older to C. C is 7 years younger to L. Who is the eldest?

When a number is divided by 63 the remainder is obtained as 26. What will be the remainder when the number is divided by 3?

Among three numbers , second is twice the first and also thrice the third . If the average of the three numbers is 33 , then the largest number is