Quantitative Aptitude - Arithmetic Ability Questions

If A : B = 3 : 5, then what is the value of A + B : B?

If √20 + √125 = 15.65, then what is the value of √45 + √5?

In what ratio should Darjeeling Tea costing Rs. 400 per kg be mixed with Assam Tea costing Rs. 300 per kg. So that by selling the mixture at Rs. 408 per kg, there is a gain of 20%?

At 6% simple interest per annum a sum of money became Rs. 834 in 6.5 years. The sum initially invested was

Neeraj's earning was decreased by 60% and after that subsequently increased by 60%. Find the final loss % on his earnings?

From point P, at 6 : 30 pm, a train starts moving towards Q with the speed of 40 km/hr. Another train starts moving from point Q at 7:30 p.m. towards point P at the speed of 60 km/hr. Both of them meet at 11:30 p.m. at point R. What is the ratio of PR and QR?

The average of ten numbers is 18. If one number is removed, then the average becomes 16, then what is the removed number?

Which of the following numbers is divisible by 12?