Quantitative Aptitude - Arithmetic Ability Questions

The average of 44 consecutive odd numbers is 144.What is the largest number?

A train moves at the speed of 40 m/s and crosses a bridge of length 550 metres in 25 seconds. What is the length (in metres) of the train?

A solid copper sphere of radius 9 cm is melted and reformed into a wire of radius 1 mm. What will be the length of this wire? (Take π = 22/7)

The number 3521is divided by 8. What is the remainder?

What is the third proportional to 9 and 45?

The ratio of the present ages of Aman and Ankit is 2 : 1 and the sum of their present ages is 72 years. What will be the Aman's age (in years) after 6 years?

The standard deviation of the set {10, 10, 10, 10, 10} is

Two bottles contain acid and water in the ratio 2 : 3 and 1 : 2 respectively. These are mixed in the ratio 1 : 3. What is the ratio of acid and water in the new mixture ?