Quantitative Aptitude - Arithmetic Ability Questions

1/3 part of a certain journey is covered with the speed of 25 km/hr, 1/2 part of the journey is covered with the speed of 45 km/hr and the remaining part covered with the speed of 37.5 km/hr. What is the average speed (in km/hr) for the whole journey?

One-third of Poojitha's age three years ago plus one-half of her age two years from now is twenty years. How old is she now?

Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

The radius of the circle is 14 cm, an arc is subtend an angle 54 degree at center. Find the length of the arc (in cm).

What is the third proportional to 9 and 15?

If x – y – √18 = –1 and x + y – 3√2 = 1, then what is the value of 12xy(x2 – y2)?

In the following question, select the related number from the given alternatives.

695 : 659 : : 839 : ?

Select the odd number from the given alternatives.