Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letter from the given alternatives.

What is the x-intercept of line joining (4, 2) and (6, 3)?

If a - b = 2 and ab = 15, then what is the value of a3- b3?

What is the rate of interest if simple interest earned on a certain sum for the 3rd year is Rs 1,750 and compound interest earned for 2 years is Rs 3622.5?

Each member of a club contributes as much rupees and as much paise as the number of members of the club. If the total contribution is Rs. 2525, then the number of members of the club is

7/15 of 5/3 of a number is greater than 7/9 of 3/5 of the same number by 9. Find the quadruple of the number.

Due to inclement weather, an air plane reduced its speed by 300 Km/ hr, and reached the destination of 1200 km late by 2hrs. Then the schedule duration of the flight was.

If by selling an article for Rs. 390 a shopkeeper gains 20% , then the cost is