Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 36+729381+643

If 4/5th of 6/7th of a number is 216, then 8/9th of that number will be

In a trapezium, one diagonal divides the other in the ratio 2 : 9. If the length of the larger of the two parallel sides is 45 cm, then what is the length (in cm) of the other parallel side?

When a number is increased by 120, it becomes 130% of itself. What is the number?

The mean of 20 observations is 19. One more observation is included and the new mean becomes 20. The 21st observation is

The difference between simple interest on a certain sum at the rate of 6% per annum for 5 years and 6 years is 25.8. What is the sum (in Rs)?

When 0.090909.....is converted into a fraction, then the result is

A can do a work in 36 days and B in 12 days. If they work on it together for 3 days, then what fraction of work is left?