Quantitative Aptitude - Arithmetic Ability Questions

If the value of √42 is approximately 6.480, then what is the approximate value of √(6/7)?

tanAcosec2A is equal to

Ramesh and Rahman can do a work in 20 and 25 days respectively. After doing collectively 10 days of work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?

(1132 + 1152 + 1172 - 113 x 115 - 115 x 117 - 117 x 113) is equal to

The diagonal of a cube is 192 cm. Its volume in cm3 will be 

What is the place value and face value of 9 in 68956 respectively?

What is the average of all the one digit and two digit natural numbers?

Krish is 5 years younger than Parthiv. Eight years ago three times the age of Krish was 10 more than twice the age of Parthiv. Find Krish's present age?