Quantitative Aptitude - Arithmetic Ability Questions

What is the unit digit of 15+25+35+...+205 ?

If 2x + 2(4 + 3x) < 2 + 3x > 2x + x/2; then x can take which of the following values?

The value of sec217°-1tan273°-sin17°sec73°

During morning walk, a man covers a distance of 3 km, 4 km, 3.5 km, 5 km and 4.5 km from Monday to Friday, respectively. How much distance should he cover on two more days, so that his average per week becomes 4 km per day?

In ΔABC, ∠B = 70° and ∠C = 60°. The internal bisectors of the two smallest angles of ΔABC meet at O. The angle so formed at O is

If a certain sum of money doubles itself in 7 years 8 months at simple interest, then what will be the yearly rate of interest (in %)?

A can do 1/3rd of a job in 3 days and B can do half of the job in 9 days. If they work on it together, then in how many days can they finish half of the job?

At what point does the line 3x + 2y = 12 cuts the Y-axis?