Quantitative Aptitude - Arithmetic Ability Questions

Mahanath works 2 times as fast as Sahay. If Sahay can complete a job alone in 21 days, then in how many days can they together finish the job?

Mr. Rajesh buys a toy for Rs. 27.50 and sells it for Rs. 28.60. Find the gain %.

Which of the fractions given below, when added to 5/8, gives 1?

Select the odd word/letters/number/number pair from the given alternatives.

If x3+ 2x2– 5x + k is divisible by x + 1, then what is the value of k?

∆XYZ is right angled at Y. If tanX = 24/7, then what is the value of cotZ ?

In each of the following questions two equations I and II are given. Solve both the equations and give answer:
$$\begin{gathered} I. x2+2x-195=0 \\ II. y2+30y+225=0 \end{gathered}$$

The list price (marked price ) of an article is Rs. 900 and is available at two successive discounts of 20% and 10% ; the selling price of the article,in rupees, is