Quantitative Aptitude - Arithmetic Ability Questions

X and Y started a business investing Rs 12000 and Rs 9000 respectively. After 4 months, X left the business and Z joined the business by investing Rs. 18000. At the end of the year, there was a profit of Rs 12500. What is the share (in Rs) of Z in the profit?

If x+1x=-2,then the value of x7+1x7

Shams invested Rs. 5000 at 10% per annum compound interest. After n years, Shams received Rs. 1655 more. Find the value of n.

If Cot θ = 21/20, then what is the value of Sec θ?

If the cost price of an article is Rs x . It is marked up by 100%. It is sold at Rs 1,200 after giving 20% discount. What is value of x?

24 men can repair a road in 50 days. If they are joined by 16 more men, then in how much time (in days) the road can be repaired?

If a - b = -5 and a2+b2=73, then find ab.

If x + (1/x) = (√3 + 1)/2, then what is the value of x4 + (1/x4)?