Quantitative Aptitude - Arithmetic Ability Questions

Two trains are moving in the opposite direction at speed of 30 km/hr and 45 km/hr respectively, whose lengths are 450 m and 550 m respectively. What is the time taken (in seconds) by slower train to cross the faster train?

Raj sells a machine for Rs 51 lakhs at a loss. Had he sold it for Rs 60 lakh, his gain would have been 8 times the earlier loss. What is the cost price of the machine?

A can finish a work in 7 days . B can finish the same work in 9 days . The days required to finish the work by both of them together.

(1155) +(18 − 6) × 9 =?

If 2/3(6x/5 - 1/4) + 1/3 = 9x/5, then what is the value of x?

Akash is 3 times as good a workman as Baldev and therefore is able to finish a job in 40 days less than Baldev. Working together, they can finish it in _____.

A can paint a house in 55 days and B can do it in 66 days. Along with C, they did the job in 12 days only. Then, C alone can do the job in how many days?

If a-1a=7,then a2+1a2=?