Quantitative Aptitude - Arithmetic Ability Questions

Two buses are moving towards each other with speed of 20 km/hr and 34 km/hr respectively. What will be the distance (in metres) between the two buses one second before they collide?

To travel 660 km, an Express train takes 10 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 7 hours less than Rajdhani. The speed of Rajdhani is

The ratio of present ages of P and Q is 5 : 8. Three years later their ages will be in ratio 8 : 11. What is the present age (in years) of Q?

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

The points A(3,­-2), B(1,4) and C(­-2,x) are collinear. What is the value of x?

What is the area (in sq cm) of a rectangle if its diagonal is 25 cm and one of its sides is 24 cm?

An angle is smaller than its supplementary angle by 50°. What is the measure of the angle?

Common factor of 12a4b6, 18a6c2, 36a2b2 is