Quantitative Aptitude - Arithmetic Ability Questions

Which of the following is not a Triangular number?

The four walls and ceiling of a room of length 25 m, breadth 12 m and height 10 m are to be painted. Painter A can paint 200 m2 in 5 days, Painter B can paint 250 m2 in 2 days. If A and B work together, they will finish the job in

If the length of one side and the diagonal of a rectangle are 5 cm and 13 cm respectively, then find its perimeter (in cm).

If 5x/2 - [7(6x - 3/2)]/4 = 5/8, then what is the value of x?

Three balls ring at intervals of 15, 30 and 45minutes respectively. At what time will they ring together again, if they rang simultaneously at 8.00 AM?

What are the co­-ordinates of the mid point of the segment joining points C(0,­-3) and D(8,5)?

Find the unit place digit in 192102 + 193103

If  a+1/a = 3, then a3+1a3?