Quantitative Aptitude - Arithmetic Ability Questions

A starts a business, after 6 months B also join him with Rs.4500 and after 2 months of B’s joining C also join them with Rs.4500. If A gets approx. Rs 4900 out of total annual profit of Rs. 10,000 then find the approximate value of initial investment of A.

A person bought pens at 25 for a rupee and sold at 15 for a rupee. What is his profit percentage?

There is a square field of area ‘X’ square meters. A cylindrical ditch of radius 7 meters and depth 2 meters is dug, and the earth is taken out and spread over the remaining part of the square field, the height of square field which goes up by 0.77 meters. What is the value of ‘X’ ? 

If N = 1 + 11 + 111 + 1111 + ... +111111111, then what is the sum of the digit's of N?

If 3x - 4 > 2 - x/3 and 3x + 5 > 4x - 5; then find the value of x?

Average age of 20 students is 21 years. 2 students leave the group and 1 new student joins the group. The average now becomes 20 years. If age of one of the student who left the group is 26 years and the one who joined is 20 years, then what is the age (in years) of the other student who left the group?

1st January 2018 was a Monday. Which of the following years will also start on a Monday?

A car moves at a speed of 72 km/hr after repairing and moves at the speed of 54 km/hr before repairing. It covers X distance in 6 hours after repairing. How much time (inhours) will it take to cover 3X distance before repairing?