Quantitative Aptitude - Arithmetic Ability Questions

The length of the diagonal and the breadth of a rectangle is 26 cm and 10 cm respectively. Calculate its area (in cm2).

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

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?

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)?

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?

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

Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.

For x = 462+3, what is the value of x+22x-22+x+23x-23